Index: firmware/App/Services/Reservoirs.c
===================================================================
diff -u -r7d4711edd7b40cd3e29f43e766f79a8a09586fe9 -r3a007e014c41538a1256ce5f42093763db82e84d
--- firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 7d4711edd7b40cd3e29f43e766f79a8a09586fe9)
+++ firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 3a007e014c41538a1256ce5f42093763db82e84d)
@@ -125,6 +125,7 @@
 static RESERVOIRS_PREVIOUS_STATUS reservoirPreviousStatus[ NUM_OF_DG_RESERVOIRS ];                ///< Reservoirs previous status.
 static HD_MODE_SUB_MODE_T hdModes;                                                                ///< HD operations mode.
 static NV_OPS_T nvOps;                                                                            ///< Non-volatile memory operations.
+static BOOL transferInProgress;                                                                   ///< Flag indicates if transfer is in progress between reservoirs.
 
 // ********** private function prototypes **********
 
@@ -149,6 +150,7 @@
     dataPublishCounter                = DATA_PUBLISH_COUNTER_START_COUNT;
     nvOps.hasDisStatusBeenWrittenToNV = FALSE;
     nvOps.hasROGenVolBeenWrittenToNV  = FALSE;
+    transferInProgress                = FALSE;
 
     memset( &reservoirPreviousStatus, 0.0, sizeof( RESERVOIRS_PREVIOUS_STATUS ) * NUM_OF_DG_RESERVOIRS );
 }
@@ -285,6 +287,11 @@
         cmdResponse.rejectCode = DG_CMD_REQUEST_REJECT_REASON_INVALID_MODE;
     }
 
+    if ( FALSE == cmdResponse.rejected )
+    {
+        transferInProgress = FALSE;
+    }
+
     sendCommandResponseMsg( &cmdResponse );
 }
 
@@ -333,6 +340,11 @@
         cmdResponse.rejectCode = DG_CMD_REQUEST_REJECT_REASON_INVALID_MODE;
     }
 
+    if ( FALSE == cmdResponse.rejected )
+    {
+        transferInProgress = TRUE;
+    }
+
     sendCommandResponseMsg( &cmdResponse );
 }
 
@@ -543,6 +555,18 @@
 
 /*********************************************************************//**
  * @brief
+ * The isReservoirTransferInProgress function gets the transferInProgress flag.
+ * @details Inputs: transferInProgress
+ * @details Outputs: none
+ * @return reservoir in progress flag.
+ *************************************************************************/
+BOOL isReservoirTransferInProgress( void )
+{
+    return transferInProgress;
+}
+
+/*********************************************************************//**
+ * @brief
  * The getTargetDialysateFlowLPM function returns the target dialysate flow
  * rate in L/min.
  * @details Inputs: none