diff --git a/libs/mavlink/include/mavlink/v2.0 b/libs/mavlink/include/mavlink/v2.0
index 6bbc8a51d8f37537732d3f5170093d49e64c6f4b..5be9f5bf6002d58199cafafb5d416929fb8d8bcd 160000
--- a/libs/mavlink/include/mavlink/v2.0
+++ b/libs/mavlink/include/mavlink/v2.0
@@ -1 +1 @@
-Subproject commit 6bbc8a51d8f37537732d3f5170093d49e64c6f4b
+Subproject commit 5be9f5bf6002d58199cafafb5d416929fb8d8bcd
diff --git a/src/AutoPilotPlugins/APM/APMSensorsComponentController.cc b/src/AutoPilotPlugins/APM/APMSensorsComponentController.cc
index adcc5d0c1b37a2921e4ddb6ae0bdfc8c49d8a00a..09a50bd4d98f3439b68f1f1bf166987b49f8f20a 100644
--- a/src/AutoPilotPlugins/APM/APMSensorsComponentController.cc
+++ b/src/AutoPilotPlugins/APM/APMSensorsComponentController.cc
@@ -588,7 +588,10 @@ void APMSensorsComponentController::nextClicked(void)
                                       &msg,
                                       0,    // command
                                       1,    // result
-                                      0);   // progress
+                                      0,    // progress
+                                      0,    // result_param2
+                                      0,    // target_system
+                                      0);   // target_component
 
     _vehicle->sendMessageOnLink(_vehicle->priorityLink(), msg);
 
diff --git a/src/FirmwarePlugin/APM/APMParameterMetaData.cc b/src/FirmwarePlugin/APM/APMParameterMetaData.cc
index 4a7fba0cee673f27f25f7231647f4488de7741f7..7d9b848ef3280c39da4beb3077c30b0b55f2db08 100644
--- a/src/FirmwarePlugin/APM/APMParameterMetaData.cc
+++ b/src/FirmwarePlugin/APM/APMParameterMetaData.cc
@@ -18,6 +18,8 @@
 #include <QDebug>
 #include <QStack>
 
+static const char* kInvalidConverstion = "Internal Error: No support for string parameters";
+
 QGC_LOGGING_CATEGORY(APMParameterMetaDataLog,           "APMParameterMetaDataLog")
 QGC_LOGGING_CATEGORY(APMParameterMetaDataVerboseLog,    "APMParameterMetaDataVerboseLog")
 
@@ -57,13 +59,17 @@ QVariant APMParameterMetaData::_stringToTypedVariant(const QString& string,
         convertTo = QVariant::Double;
         break;
     case FactMetaData::valueTypeString:
-        qWarning() << "Internal Error: No support for string parameters";
+        qWarning() << kInvalidConverstion;
         convertTo = QVariant::String;
         break;
     case FactMetaData::valueTypeBool:
-        qWarning() << "Internal Error: No support for string parameters";
+        qWarning() << kInvalidConverstion;
         convertTo = QVariant::Bool;
         break;
+    case FactMetaData::valueTypeCustom:
+        qWarning() << kInvalidConverstion;
+        convertTo = QVariant::ByteArray;
+        break;
     }
 
     *convertOk = var.convert(convertTo);
diff --git a/src/Vehicle/Vehicle.h b/src/Vehicle/Vehicle.h
index 5d2c69ab7f1d69b9374177caedf855c71cd6a98d..9fc162a5700cac193755c47d35533ad87633a830 100644
--- a/src/Vehicle/Vehicle.h
+++ b/src/Vehicle/Vehicle.h
@@ -692,8 +692,6 @@ public:
     uint64_t capabilityBits     (void) const { return _capabilityBits; }    // Change signalled by capabilityBitsChanged
     QGCCameraManager*           dynamicCameras      () { return _cameras; }
 
-    bool capabilitiesKnown(void) const { return _vehicleCapabilitiesKnown; }
-
     /// @true: When flying a mission the vehicle is always facing towards the next waypoint
     bool vehicleYawsToNextWaypointInMission(void) const;
 
diff --git a/src/comm/MockLink.cc b/src/comm/MockLink.cc
index 70a1fc5210cdbc064c9ef3114fb853c0dc5c2ae9..c9872fef87e8c3693fd4202c3bfe97c81da61c9e 100644
--- a/src/comm/MockLink.cc
+++ b/src/comm/MockLink.cc
@@ -870,7 +870,10 @@ void MockLink::_handleCommandLong(const mavlink_message_t& msg)
                                       &commandAck,
                                       request.command,
                                       commandResult,
-                                      0);
+                                      0,    // progress
+                                      0,    // result_param2
+                                      0,    // target_system
+                                      0);   // target_component
     respondWithMavlinkMessage(commandAck);
 }