Index: sources/canbus/messageinterpreter.cpp
===================================================================
diff -u -rb789046c096cfdddb39adcd3d5be1e129769aac6 -r03de7d132838c54a23862809357c42102b6dab99
--- sources/canbus/messageinterpreter.cpp	(.../messageinterpreter.cpp)	(revision b789046c096cfdddb39adcd3d5be1e129769aac6)
+++ sources/canbus/messageinterpreter.cpp	(.../messageinterpreter.cpp)	(revision 03de7d132838c54a23862809357c42102b6dab99)
@@ -40,9 +40,13 @@
 
 bool MessageInterpreter::isPayloadLenValid(const Message &vMessage, Gui::GuiActionType vType) const
 {
+    QString mActionIdHexString = Format::toHexString(vMessage.actionId);
+    if ( ! payloadLen.contains(vType) ) {
+        LOG_ERROR(tr("Undefined data length for Message ID (HD) '%1'").arg(mActionIdHexString));
+        return false;
+    }
     if ( vMessage.data.length() < payloadLen[vType] ) {
-        QString mActionIdHexString = Format::toHexString(vMessage.actionId);
-        LOG_ERROR(tr("Incorrect data for Message ID (HD) '%1'").arg(mActionIdHexString));
+        LOG_ERROR(tr("Incorrect data length for Message ID (HD) '%1'").arg(mActionIdHexString));
         return false;
     }
     return true;
@@ -772,7 +776,7 @@
     if ( ! isType           (vMessage, Gui::GuiActionType::UltrafiltrationState) ) return ok;
     if ( ! isPayloadLenValid(vMessage, Gui::GuiActionType::AcknowGeneric       ) ) return ok;
 
-    Model::MTreatmentUltrafiltrationState mData;
+    Model::MUltrafiltrationStateResponse mData;
     ok = mData.fromByteArray(vMessage.data);
     LOG_DATUM(mData.toString());