Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -r3e1af7cc2576e347ab8bdf2f400196b2301def07 -r345a9b1694f4b0a9c9d3e9be45ee2e1f113dc942
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 3e1af7cc2576e347ab8bdf2f400196b2301def07)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 345a9b1694f4b0a9c9d3e9be45ee2e1f113dc942)
@@ -285,6 +285,7 @@
     { MSG_ID_FP_DEF_GEN_PUBLISH_INTERVAL_OVERRIDE_REQUEST,                          &testGenPermeateDefDataPublishIntervalOverride},
     { MSG_ID_FP_DEF_STATUS_REQUEST,                                                 &testGetFPDefeaturedStatus },
     { MSG_ID_FP_SET_OPERATION_SUB_MODE_REQUEST,                                     &testSetFPOperationSubMode },
+    { MSG_ID_DD_SET_OPERATION_SUB_MODE_OVERRIDE_REQUEST,                            &testSetOperationSubMode },
 };
 
 /// Calculation for number of entries in the incoming message function handler look-up table.