Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -r290cac3c0557c978647cef2972800dfe137dd662 -r5db64c182f58f16d6b4b9a5131a2913b4a156ccc
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 290cac3c0557c978647cef2972800dfe137dd662)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 5db64c182f58f16d6b4b9a5131a2913b4a156ccc)
@@ -284,6 +284,7 @@
     { MSG_ID_FP_RO_FILTERED_REJECTION_RATIO_OVERRIDE_REQUEST,                       &testRORejectionRatioFilteredOverride },
     { MSG_ID_DD_BICART_DRAIN_REQUEST_OVERRIDE_REQUEST,                              &testDryBiCartDrainRequestOverride },
     { MSG_ID_DD_BICART_CARTRIDGE_SELECT_OVERRIDE_REQUEST,                           &testDryBiCartTypeOverride },
+    { MSG_ID_DD_SET_OPERATION_SUB_MODE_OVERRIDE_REQUEST,                            &testSetOperationSubMode },
 };
 
 /// Calculation for number of entries in the incoming message function handler look-up table.