Index: sources/canbus/MessageDispatcher.cpp
===================================================================
diff -u -r695e95aa2ec5e6e1c395567449ac0f671ecd61ed -r583d1953c783940c93f22c37b23daadb1ff3a09c
--- sources/canbus/MessageDispatcher.cpp	(.../MessageDispatcher.cpp)	(revision 695e95aa2ec5e6e1c395567449ac0f671ecd61ed)
+++ sources/canbus/MessageDispatcher.cpp	(.../MessageDispatcher.cpp)	(revision 583d1953c783940c93f22c37b23daadb1ff3a09c)
@@ -618,7 +618,9 @@
     bool mNeedsAcknow = needsAcknow(vActionId);
     if (mNeedsAcknow) {
         mSequence = -mSequence;
+        #ifndef DISABLE_ACKNOW_CHECKIN_MESSAGE_LOG
         LOG_EVENT(tr("UI,Ack Req, Sq:%1, ID:%2").arg(mSequence).arg(Format::toHexString(vActionId)));
+        #endif
 #ifdef DEBUG_ACKBACK_HD_TO_UI
                 qDebug() << tr(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ UI AckReq : %1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ").arg(mSequence);
 #endif
@@ -696,7 +698,9 @@
         GuiActionType mActionId = vMessage.actionId;
         switch (mActionId) {
         case GuiActionType::ID_Acknow:
+            #ifndef DISABLE_ACKNOW_CHECKIN_MESSAGE_LOG
             LOG_EVENT(tr("HD,Ack Bak, Sq:%1").arg(mSequence));
+            #endif
             #ifdef DEBUG_ACKBACK_HD_TO_UI
                 qDebug() << tr(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ HD AckBak : %1 %2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ").arg(mSequence).arg(vMessage.actionId);
             #endif
@@ -705,13 +709,17 @@
 
         default:
             if (mSequence < 0) {
+                #ifndef DISABLE_ACKNOW_CHECKIN_MESSAGE_LOG
                 LOG_EVENT(tr("HD,Ack Req, Sq:%1, ID:%2").arg(mSequence).arg(Format::toHexString(mActionId)));
+                #endif
                 #ifdef DEBUG_ACKBACK_HD_TO_UI
                     qDebug() << tr(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ HD AckReq : %1 %2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ").arg(mSequence).arg(vMessage.actionId);
                 #endif
                 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ UI AckBak is immediately handled at the same place.
                 actionTransmit(GuiActionType::ID_Acknow, {}, -mSequence);
+                #ifndef DISABLE_ACKNOW_CHECKIN_MESSAGE_LOG
                 LOG_EVENT(tr("UI,Ack Bak, Sq:%1").arg(-mSequence));
+                #endif
                 #ifdef DEBUG_ACKBACK_HD_TO_UI
                     qDebug() << tr(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ UI AckBak : %1 %2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ").arg(-mSequence).arg(vMessage.actionId);
                 #endif