Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -ra60ec05d359c0d3f014015e9080b6dbcef0fea28 -r477515fb4a6518b538fd218a1638ba2958e82d1c
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision a60ec05d359c0d3f014015e9080b6dbcef0fea28)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 477515fb4a6518b538fd218a1638ba2958e82d1c)
@@ -541,7 +541,7 @@
     if ( resID < NUM_OF_DG_RESERVOIRS )
     {
         dgActiveReservoirSet = resID;
-        sendDGSwitchReservoirCommand( resID );
+        sendDGSwitchReservoirCommand( (U32)resID );
         // reset treatment reservoir mgmt. state machine on reservoir switch
         currentTrtResMgmtState = TREATMENT_RESERVOIR_MGMT_START_STATE;
     }