diff --git a/sdrbase/resources/index.html b/sdrbase/resources/index.html
index 95b9c8dce..fd82e42d5 100644
--- a/sdrbase/resources/index.html
+++ b/sdrbase/resources/index.html
@@ -5527,20 +5527,90 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
-                            <h3> Status: 400 - Invalid frequency </h3>
+                            <h3> Status: 400 - Invalid JSON request </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetDelete-400-schema">Schema</a>
+                                </li>
+
                             </ul>
 
                             <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetDelete-400-schema">
+                                  <div id='responses-instancePresetDelete-400-schema-400' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Invalid JSON request",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetDelete-400-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetDelete-400-schema-400');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetDelete-400-schema-data' type='hidden' value=''></input>
+                                </div>
                             </div>
 
                             <h3> Status: 404 - Preset not found </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetDelete-404-schema">Schema</a>
+                                </li>
+
                             </ul>
 
                             <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetDelete-404-schema">
+                                  <div id='responses-instancePresetDelete-404-schema-404' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Preset not found",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetDelete-404-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetDelete-404-schema-404');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetDelete-404-schema-data' type='hidden' value=''></input>
+                                </div>
                             </div>
 
                             <h3> Status: 500 - Error </h3>
@@ -6195,7 +6265,7 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
-                            <h3> Status: 400 - Preset type and device set type mismatch </h3>
+                            <h3> Status: 400 - Invalid JSON request or preset type and device set type mismatch </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
                                 <li class="active">
@@ -6210,7 +6280,7 @@ $(document).ready(function() {
                                     <script>
                                       $(document).ready(function() {
                                         var schemaWrapper = {
-  "description" : "Preset type and device set type mismatch",
+  "description" : "Invalid JSON request or preset type and device set type mismatch",
   "schema" : {
     "$ref" : "#/definitions/ErrorResponse"
   }
@@ -6633,6 +6703,49 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
+                            <h3> Status: 400 - Invalid JSON request </h3>
+
+                            <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetPost-400-schema">Schema</a>
+                                </li>
+
+                            </ul>
+
+                            <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetPost-400-schema">
+                                  <div id='responses-instancePresetPost-400-schema-400' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Invalid JSON request",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetPost-400-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetPost-400-schema-400');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetPost-400-schema-data' type='hidden' value=''></input>
+                                </div>
+                            </div>
+
                             <h3> Status: 404 - Device set not found </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
@@ -6676,7 +6789,7 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
-                            <h3> Status: 409 - Error </h3>
+                            <h3> Status: 409 - Preset already exists </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
                                 <li class="active">
@@ -6691,7 +6804,7 @@ $(document).ready(function() {
                                     <script>
                                       $(document).ready(function() {
                                         var schemaWrapper = {
-  "description" : "Error",
+  "description" : "Preset already exists",
   "schema" : {
     "$ref" : "#/definitions/ErrorResponse"
   }
@@ -6719,6 +6832,49 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
+                            <h3> Status: 500 - Error </h3>
+
+                            <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetPost-500-schema">Schema</a>
+                                </li>
+
+                            </ul>
+
+                            <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetPost-500-schema">
+                                  <div id='responses-instancePresetPost-500-schema-500' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Error",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetPost-500-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetPost-500-schema-500');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetPost-500-schema-data' type='hidden' value=''></input>
+                                </div>
+                            </div>
+
                             <h3> Status: 501 - Function not implemented </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
@@ -7028,6 +7184,49 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
+                            <h3> Status: 400 - Invalid JSON request </h3>
+
+                            <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetPut-400-schema">Schema</a>
+                                </li>
+
+                            </ul>
+
+                            <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetPut-400-schema">
+                                  <div id='responses-instancePresetPut-400-schema-400' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Invalid JSON request",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetPut-400-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetPut-400-schema-400');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetPut-400-schema-data' type='hidden' value=''></input>
+                                </div>
+                            </div>
+
                             <h3> Status: 404 - No preset or device set found </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
@@ -7439,7 +7638,7 @@ except ApiException as e:
           </div>
           <div id="generator">
             <div class="content">
-              Generated 2017-11-25T18:28:10.878+01:00
+              Generated 2017-11-25T19:38:10.216+01:00
             </div>
           </div>
       </div>
diff --git a/sdrbase/webapi/webapiadapterinterface.h b/sdrbase/webapi/webapiadapterinterface.h
index 32f71a9ec..c8719e9bd 100644
--- a/sdrbase/webapi/webapiadapterinterface.h
+++ b/sdrbase/webapi/webapiadapterinterface.h
@@ -174,6 +174,15 @@ public:
             Swagger::SWGErrorResponse& error __attribute__((unused)))
     { return 501; }
 
+    /**
+     * Handler of /sdrangel/preset (DELETE) swagger/sdrangel/code/html2/index.html#api-Default-instanceChannels
+     * returns the Http status code (default 501: not implemented)
+     */
+    virtual int instancePresetDelete(
+            Swagger::SWGPresetIdentifier& response __attribute__((unused)),
+            Swagger::SWGErrorResponse& error __attribute__((unused)))
+    { return 501; }
+
     static QString instanceSummaryURL;
     static QString instanceDevicesURL;
     static QString instanceChannelsURL;
diff --git a/sdrbase/webapi/webapirequestmapper.cpp b/sdrbase/webapi/webapirequestmapper.cpp
index a876c850a..d16f24f7b 100644
--- a/sdrbase/webapi/webapirequestmapper.cpp
+++ b/sdrbase/webapi/webapirequestmapper.cpp
@@ -352,12 +352,23 @@ void WebAPIRequestMapper::instancePresetService(qtwebapp::HttpRequest& request,
         if (parseJsonBody(jsonStr, response))
         {
             query.fromJson(jsonStr);
-            int status = m_adapter->instancePresetPatch(query, normalResponse, errorResponse);
-            response.setStatus(status);
 
-            if (status == 200) {
-                response.write(normalResponse.asJson().toUtf8());
-            } else {
+            if (validatePresetTransfer(query))
+            {
+                int status = m_adapter->instancePresetPatch(query, normalResponse, errorResponse);
+                response.setStatus(status);
+
+                if (status == 200) {
+                    response.write(normalResponse.asJson().toUtf8());
+                } else {
+                    response.write(errorResponse.asJson().toUtf8());
+                }
+            }
+            else
+            {
+                response.setStatus(400,"Invalid JSON request");
+                errorResponse.init();
+                *errorResponse.getMessage() = "Invalid JSON request";
                 response.write(errorResponse.asJson().toUtf8());
             }
         }
@@ -371,12 +382,23 @@ void WebAPIRequestMapper::instancePresetService(qtwebapp::HttpRequest& request,
         if (parseJsonBody(jsonStr, response))
         {
             query.fromJson(jsonStr);
-            int status = m_adapter->instancePresetPut(query, normalResponse, errorResponse);
-            response.setStatus(status);
 
-            if (status == 200) {
-                response.write(normalResponse.asJson().toUtf8());
-            } else {
+            if (validatePresetTransfer(query))
+            {
+                int status = m_adapter->instancePresetPut(query, normalResponse, errorResponse);
+                response.setStatus(status);
+
+                if (status == 200) {
+                    response.write(normalResponse.asJson().toUtf8());
+                } else {
+                    response.write(errorResponse.asJson().toUtf8());
+                }
+            }
+            else
+            {
+                response.setStatus(400,"Invalid JSON request");
+                errorResponse.init();
+                *errorResponse.getMessage() = "Invalid JSON request";
                 response.write(errorResponse.asJson().toUtf8());
             }
         }
@@ -390,12 +412,52 @@ void WebAPIRequestMapper::instancePresetService(qtwebapp::HttpRequest& request,
         if (parseJsonBody(jsonStr, response))
         {
             query.fromJson(jsonStr);
-            int status = m_adapter->instancePresetPost(query, normalResponse, errorResponse);
-            response.setStatus(status);
 
-            if (status == 200) {
-                response.write(normalResponse.asJson().toUtf8());
-            } else {
+            if (validatePresetTransfer(query))
+            {
+                int status = m_adapter->instancePresetPost(query, normalResponse, errorResponse);
+                response.setStatus(status);
+
+                if (status == 200) {
+                    response.write(normalResponse.asJson().toUtf8());
+                } else {
+                    response.write(errorResponse.asJson().toUtf8());
+                }
+            }
+            else
+            {
+                response.setStatus(400,"Invalid JSON request");
+                errorResponse.init();
+                *errorResponse.getMessage() = "Invalid JSON request";
+                response.write(errorResponse.asJson().toUtf8());
+            }
+        }
+    }
+    else if (request.getMethod() == "DELETE")
+    {
+        Swagger::SWGPresetIdentifier normalResponse;
+        QString jsonStr = request.getBody();
+
+        if (parseJsonBody(jsonStr, response))
+        {
+            normalResponse.fromJson(jsonStr);
+
+            if (validatePresetIdentifer(normalResponse))
+            {
+                int status = m_adapter->instancePresetDelete(normalResponse, errorResponse);
+                response.setStatus(status);
+
+                if (status == 200) {
+                    response.write(normalResponse.asJson().toUtf8());
+                } else {
+                    response.write(errorResponse.asJson().toUtf8());
+                }
+            }
+            else
+            {
+                response.setStatus(400,"Invalid JSON request");
+                errorResponse.init();
+                *errorResponse.getMessage() = "Invalid JSON request";
                 response.write(errorResponse.asJson().toUtf8());
             }
         }
@@ -439,3 +501,21 @@ bool WebAPIRequestMapper::parseJsonBody(QString& jsonStr, qtwebapp::HttpResponse
         return false;
     }
 }
+
+bool WebAPIRequestMapper::validatePresetTransfer(Swagger::SWGPresetTransfer& presetTransfer)
+{
+    Swagger::SWGPresetIdentifier *presetIdentifier = presetTransfer.getPreset();
+
+    if (presetIdentifier == 0) {
+        return false;
+    }
+
+    return validatePresetIdentifer(*presetIdentifier);
+}
+
+bool WebAPIRequestMapper::validatePresetIdentifer(Swagger::SWGPresetIdentifier& presetIdentifier)
+{
+    return (presetIdentifier.getGroupName() && presetIdentifier.getName() && presetIdentifier.getType());
+}
+
+
diff --git a/sdrbase/webapi/webapirequestmapper.h b/sdrbase/webapi/webapirequestmapper.h
index 5af32eef2..3b665b3c5 100644
--- a/sdrbase/webapi/webapirequestmapper.h
+++ b/sdrbase/webapi/webapirequestmapper.h
@@ -27,6 +27,12 @@
 #include "staticfilecontroller.h"
 #include "webapiadapterinterface.h"
 
+namespace Swagger
+{
+    class SWGPresetTransfer;
+    class SWGPresetIdentifier;
+}
+
 class WebAPIRequestMapper : public qtwebapp::HttpRequestHandler {
     Q_OBJECT
 public:
@@ -48,6 +54,9 @@ private:
     void instanceDVSerialService(qtwebapp::HttpRequest& request, qtwebapp::HttpResponse& response);
     void instancePresetService(qtwebapp::HttpRequest& request, qtwebapp::HttpResponse& response);
 
+    bool validatePresetTransfer(Swagger::SWGPresetTransfer& presetTransfer);
+    bool validatePresetIdentifer(Swagger::SWGPresetIdentifier& presetIdentifier);
+
     bool parseJsonBody(QString& jsonStr, qtwebapp::HttpResponse& response);
 };
 
diff --git a/sdrgui/mainwindow.cpp b/sdrgui/mainwindow.cpp
index 1370bda17..03eb9f06e 100644
--- a/sdrgui/mainwindow.cpp
+++ b/sdrgui/mainwindow.cpp
@@ -64,6 +64,7 @@
 
 MESSAGE_CLASS_DEFINITION(MainWindow::MsgLoadPreset, Message)
 MESSAGE_CLASS_DEFINITION(MainWindow::MsgSavePreset, Message)
+MESSAGE_CLASS_DEFINITION(MainWindow::MsgDeletePreset, Message)
 
 MainWindow *MainWindow::m_instance = 0;
 
@@ -674,6 +675,37 @@ bool MainWindow::handleMessage(const Message& cmd)
         m_settings.save();
         return true;
     }
+    else if (MsgDeletePreset::match(cmd))
+    {
+        MsgDeletePreset& notif = (MsgDeletePreset&) cmd;
+        const Preset *presetToDelete = notif.getPreset();
+
+        // remove preset from tree
+        for (int ig = 0; ig < ui->presetTree->topLevelItemCount(); ig++)
+        {
+            QTreeWidgetItem *groupItem = ui->presetTree->topLevelItem(ig);
+            if (groupItem->text(0) == presetToDelete->getGroup())
+            {
+                for (int ip = 0; ip < groupItem->childCount(); ip++)
+                {
+                    QTreeWidgetItem *presetItem = groupItem->child(ip);
+                    const Preset* preset = qvariant_cast<const Preset*>(presetItem->data(0, Qt::UserRole));
+
+                    if ((preset->getGroup() == presetToDelete->getGroup()) &&
+                        (preset->getCenterFrequency() == presetToDelete->getCenterFrequency()) &&
+                        (preset->getDescription() == presetToDelete->getDescription()) &&
+                        (preset->isSourcePreset() == presetToDelete->isSourcePreset()))
+                    {
+                        groupItem->takeChild(ip);
+                    }
+                }
+            }
+        }
+
+        // remove preset from settings
+        m_settings.deletePreset(presetToDelete);
+        return true;
+    }
 
     return false;
 }
diff --git a/sdrgui/mainwindow.h b/sdrgui/mainwindow.h
index 4552afd6e..da745d513 100644
--- a/sdrgui/mainwindow.h
+++ b/sdrgui/mainwindow.h
@@ -133,7 +133,27 @@ private:
         { }
     };
 
-	enum {
+    class MsgDeletePreset : public Message {
+        MESSAGE_CLASS_DECLARATION
+
+    public:
+        const Preset *getPreset() const { return m_preset; }
+
+        static MsgDeletePreset* create(const Preset *preset)
+        {
+            return new MsgDeletePreset(preset);
+        }
+
+    private:
+        const Preset *m_preset;
+
+        MsgDeletePreset(const Preset *preset) :
+            Message(),
+            m_preset(preset)
+        { }
+    };
+
+    enum {
 		PGroup,
 		PItem
 	};
diff --git a/sdrgui/webapi/webapiadaptergui.cpp b/sdrgui/webapi/webapiadaptergui.cpp
index 872e96592..0d7ac0f8b 100644
--- a/sdrgui/webapi/webapiadaptergui.cpp
+++ b/sdrgui/webapi/webapiadaptergui.cpp
@@ -586,6 +586,34 @@ int WebAPIAdapterGUI::instancePresetPost(
     return 200;
 }
 
+int WebAPIAdapterGUI::instancePresetDelete(
+        Swagger::SWGPresetIdentifier& response,
+        Swagger::SWGErrorResponse& error)
+{
+    const Preset *selectedPreset = m_mainWindow.m_settings.getPreset(*response.getGroupName(),
+            response.getCenterFrequency(),
+            *response.getName());
+
+    if (selectedPreset == 0)
+    {
+        *error.getMessage() = QString("There is no preset [%1, %2, %3]")
+                .arg(*response.getGroupName())
+                .arg(response.getCenterFrequency())
+                .arg(*response.getName());
+        return 404;
+    }
+
+    response.setCenterFrequency(selectedPreset->getCenterFrequency());
+    *response.getGroupName() = selectedPreset->getGroup();
+    *response.getType() = selectedPreset->isSourcePreset() ? "R" : "T";
+    *response.getName() = selectedPreset->getDescription();
+
+    MainWindow::MsgDeletePreset *msg = MainWindow::MsgDeletePreset::create(const_cast<Preset*>(selectedPreset));
+    m_mainWindow.m_inputMessageQueue.push(msg);
+
+    return 200;
+}
+
 QtMsgType WebAPIAdapterGUI::getMsgTypeFromString(const QString& msgTypeString)
 {
     if (msgTypeString == "debug") {
diff --git a/sdrgui/webapi/webapiadaptergui.h b/sdrgui/webapi/webapiadaptergui.h
index 4f38a9e67..6417d36e4 100644
--- a/sdrgui/webapi/webapiadaptergui.h
+++ b/sdrgui/webapi/webapiadaptergui.h
@@ -93,6 +93,10 @@ public:
             Swagger::SWGPresetIdentifier& response,
             Swagger::SWGErrorResponse& error);
 
+    virtual int instancePresetDelete(
+            Swagger::SWGPresetIdentifier& response,
+            Swagger::SWGErrorResponse& error);
+
 private:
     MainWindow& m_mainWindow;
 
diff --git a/swagger/sdrangel/api/swagger/swagger.yaml b/swagger/sdrangel/api/swagger/swagger.yaml
index b6fccb17b..93381715c 100644
--- a/swagger/sdrangel/api/swagger/swagger.yaml
+++ b/swagger/sdrangel/api/swagger/swagger.yaml
@@ -265,7 +265,7 @@ paths:
           schema:
             $ref: "#/definitions/PresetIdentifier"
         "400":
-          description: Preset type and device set type mismatch
+          description: Invalid JSON request or preset type and device set type mismatch
           schema:
             $ref: "#/definitions/ErrorResponse"
         "404":
@@ -295,6 +295,10 @@ paths:
           description: On success return preset identification
           schema:
             $ref: "#/definitions/PresetIdentifier"
+        "400":
+          description: Invalid JSON request
+          schema:
+            $ref: "#/definitions/ErrorResponse"
         "404":
           description: No preset or device set found
           schema:
@@ -322,6 +326,10 @@ paths:
           description: On success return preset identification
           schema:
             $ref: "#/definitions/PresetIdentifier"
+        "400":
+          description: Invalid JSON request
+          schema:
+            $ref: "#/definitions/ErrorResponse"
         "404":
           description: Device set not found
           schema:
@@ -330,7 +338,7 @@ paths:
           description: Preset already exists
           schema:
             $ref: "#/definitions/ErrorResponse"
-          "500":
+        "500":
           description: Error
           schema:
             $ref: "#/definitions/ErrorResponse"
@@ -354,9 +362,13 @@ paths:
           schema:
             $ref: "#/definitions/PresetIdentifier"
         "400":
-          description: Invalid frequency
+          description: Invalid JSON request
+          schema:
+            $ref: "#/definitions/ErrorResponse"
         "404":
           description: Preset not found
+          schema:
+            $ref: "#/definitions/ErrorResponse"
         "500":
           description: Error
           schema:
diff --git a/swagger/sdrangel/code/html2/index.html b/swagger/sdrangel/code/html2/index.html
index 95b9c8dce..fd82e42d5 100644
--- a/swagger/sdrangel/code/html2/index.html
+++ b/swagger/sdrangel/code/html2/index.html
@@ -5527,20 +5527,90 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
-                            <h3> Status: 400 - Invalid frequency </h3>
+                            <h3> Status: 400 - Invalid JSON request </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetDelete-400-schema">Schema</a>
+                                </li>
+
                             </ul>
 
                             <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetDelete-400-schema">
+                                  <div id='responses-instancePresetDelete-400-schema-400' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Invalid JSON request",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetDelete-400-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetDelete-400-schema-400');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetDelete-400-schema-data' type='hidden' value=''></input>
+                                </div>
                             </div>
 
                             <h3> Status: 404 - Preset not found </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetDelete-404-schema">Schema</a>
+                                </li>
+
                             </ul>
 
                             <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetDelete-404-schema">
+                                  <div id='responses-instancePresetDelete-404-schema-404' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Preset not found",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetDelete-404-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetDelete-404-schema-404');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetDelete-404-schema-data' type='hidden' value=''></input>
+                                </div>
                             </div>
 
                             <h3> Status: 500 - Error </h3>
@@ -6195,7 +6265,7 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
-                            <h3> Status: 400 - Preset type and device set type mismatch </h3>
+                            <h3> Status: 400 - Invalid JSON request or preset type and device set type mismatch </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
                                 <li class="active">
@@ -6210,7 +6280,7 @@ $(document).ready(function() {
                                     <script>
                                       $(document).ready(function() {
                                         var schemaWrapper = {
-  "description" : "Preset type and device set type mismatch",
+  "description" : "Invalid JSON request or preset type and device set type mismatch",
   "schema" : {
     "$ref" : "#/definitions/ErrorResponse"
   }
@@ -6633,6 +6703,49 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
+                            <h3> Status: 400 - Invalid JSON request </h3>
+
+                            <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetPost-400-schema">Schema</a>
+                                </li>
+
+                            </ul>
+
+                            <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetPost-400-schema">
+                                  <div id='responses-instancePresetPost-400-schema-400' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Invalid JSON request",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetPost-400-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetPost-400-schema-400');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetPost-400-schema-data' type='hidden' value=''></input>
+                                </div>
+                            </div>
+
                             <h3> Status: 404 - Device set not found </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
@@ -6676,7 +6789,7 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
-                            <h3> Status: 409 - Error </h3>
+                            <h3> Status: 409 - Preset already exists </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
                                 <li class="active">
@@ -6691,7 +6804,7 @@ $(document).ready(function() {
                                     <script>
                                       $(document).ready(function() {
                                         var schemaWrapper = {
-  "description" : "Error",
+  "description" : "Preset already exists",
   "schema" : {
     "$ref" : "#/definitions/ErrorResponse"
   }
@@ -6719,6 +6832,49 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
+                            <h3> Status: 500 - Error </h3>
+
+                            <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetPost-500-schema">Schema</a>
+                                </li>
+
+                            </ul>
+
+                            <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetPost-500-schema">
+                                  <div id='responses-instancePresetPost-500-schema-500' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Error",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetPost-500-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetPost-500-schema-500');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetPost-500-schema-data' type='hidden' value=''></input>
+                                </div>
+                            </div>
+
                             <h3> Status: 501 - Function not implemented </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
@@ -7028,6 +7184,49 @@ $(document).ready(function() {
                                 </div>
                             </div>
 
+                            <h3> Status: 400 - Invalid JSON request </h3>
+
+                            <ul class="nav nav-tabs nav-tabs-examples" >
+                                <li class="active">
+                                  <a data-toggle="tab" href="#responses-instancePresetPut-400-schema">Schema</a>
+                                </li>
+
+                            </ul>
+
+                            <div class="tab-content" style='margin-bottom: 10px;'>
+                                <div class="tab-pane active" id="responses-instancePresetPut-400-schema">
+                                  <div id='responses-instancePresetPut-400-schema-400' style="padding: 30px; border-left: 1px solid #eee; border-right: 1px solid #eee; border-bottom: 1px solid #eee;">
+                                    <script>
+                                      $(document).ready(function() {
+                                        var schemaWrapper = {
+  "description" : "Invalid JSON request",
+  "schema" : {
+    "$ref" : "#/definitions/ErrorResponse"
+  }
+};
+                                        var schema = schemaWrapper.schema;
+                                        if (schema.$ref != null) {
+                                          schema = defsParser.$refs.get(schema.$ref);
+                                        } else {
+                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          $RefParser.dereference(schemaWrapper).catch(function(err) {
+                                            console.log(err);
+                                          });
+                                        }
+
+                                        //console.log(JSON.stringify(schema));
+                                        var view = new JSONSchemaView(schema, 3);
+                                        $('#responses-instancePresetPut-400-schema-data').val(stringify(schema));
+                                        var result = $('#responses-instancePresetPut-400-schema-400');
+                                        result.empty();
+                                        result.append(view.render());
+                                      });
+                                    </script>
+                                  </div>
+                                  <input id='responses-instancePresetPut-400-schema-data' type='hidden' value=''></input>
+                                </div>
+                            </div>
+
                             <h3> Status: 404 - No preset or device set found </h3>
 
                             <ul class="nav nav-tabs nav-tabs-examples" >
@@ -7439,7 +7638,7 @@ except ApiException as e:
           </div>
           <div id="generator">
             <div class="content">
-              Generated 2017-11-25T18:28:10.878+01:00
+              Generated 2017-11-25T19:38:10.216+01:00
             </div>
           </div>
       </div>