Index: sources/canbus/MessageInterpreter.cpp
===================================================================
diff -u -r3e5cdca5de3ac46619325bf1e37c572d729d5fa9 -r51accb0c8de0c3fd15b65c672dc348e99059597b
--- sources/canbus/MessageInterpreter.cpp	(.../MessageInterpreter.cpp)	(revision 3e5cdca5de3ac46619325bf1e37c572d729d5fa9)
+++ sources/canbus/MessageInterpreter.cpp	(.../MessageInterpreter.cpp)	(revision 51accb0c8de0c3fd15b65c672dc348e99059597b)
@@ -37,6 +37,14 @@
     LOG_EVENT(vMODEL::toString(vData));                             \
     DEBUG_RECEIVE_SIGNAL(0, typeid(vMODEL).name())
 
+// another version of the INTERPRET_RECEIVED_MESSAGE for empty messages
+// same later improvements apply to this MACRO as well.
+#define INTERPRET_RECVD_MT_MESSAGE(vMODEL)                          \
+    if (   length ) { logInvalidLength(vActionId); return false; }  \
+    vPayload = Format::fromVariant(vData);                          \
+    LOG_EVENT(vMODEL::toString(vData));                             \
+    DEBUG_RECEIVE_SIGNAL(0, typeid(vMODEL).name())
+
 /*!
  * \brief MessageInterpreter::MessageInterpreter
  * \details Constructor
@@ -230,7 +238,7 @@
     // pre-Treatment
     case Gui::GuiActionType::ID_StartTreatmentReq                   : INTERPRET_RECEIVED_MESSAGE(StartTreatmentRequestData              ); break;
     case Gui::GuiActionType::ID_ConfirmTreatmentReq                 : INTERPRET_RECEIVED_MESSAGE(ConfirmTreatmentRequestData            ); break;
-    case Gui::GuiActionType::ID_EndTreatmentReq                     : INTERPRET_RECEIVED_MESSAGE(EndTreatmentRequestData                ); break;
+    case Gui::GuiActionType::ID_EndTreatmentReq                     : INTERPRET_RECVD_MT_MESSAGE(EndTreatmentRequestData                ); break;
     case Gui::GuiActionType::ID_CreateTreatmentReq                  : INTERPRET_RECEIVED_MESSAGE(AdjustTreatmentParametersRequestData   ); break;
     // alarms
     case Gui::GuiActionType::ID_AlarmSilenceReq                     : INTERPRET_RECEIVED_MESSAGE(AlarmSilenceRequestData                ); break;