Index: App/Services/SystemComm.c
===================================================================
diff -u -r7d70e839bc71f6fc37da8cd12eecb374841882df -rd298a85322169dcc173c6197682864c2e9dbcd24
--- App/Services/SystemComm.c	(.../SystemComm.c)	(revision 7d70e839bc71f6fc37da8cd12eecb374841882df)
+++ App/Services/SystemComm.c	(.../SystemComm.c)	(revision d298a85322169dcc173c6197682864c2e9dbcd24)
@@ -86,7 +86,7 @@
 
     // actually transmit any pending messages
     dataSize = getFromCommBuffer( COMM_BUFFER_CAN_HD_2_UI, data, sizeof(MESSAGE_WRAPPER_T) );
-    if ( dataSize <= 8 )
+    if ( dataSize > 0 && dataSize <= 8 )
     {
         canTransmit( canREG1, canMESSAGE_BOX1, data );
     }