Index: firmware/App/Services/DDInterface.c
===================================================================
diff -u -r8254d0eaea0d25b62e41dc4189ec7cabbcf4c226 -rb5fdf613847ef1da828a3213099fe61ce329491c
--- firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision 8254d0eaea0d25b62e41dc4189ec7cabbcf4c226)
+++ firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision b5fdf613847ef1da828a3213099fe61ce329491c)
@@ -120,7 +120,7 @@
     dialysateDeliveryCmdSet.bicarbConvFactor  = 0.0F;
     dialysateDeliveryCmdSet.sodium            = 0;
     dialysateDeliveryCmdSet.bicarbonate       = 0;
-    //dialysateDeliveryCmdSet.substitutionRate  = 0.0F;
+    dialysateDeliveryCmdSet.substitutionRate  = 0.0F;
 }
 
 /**********************************************************************//**
@@ -401,7 +401,7 @@
     dialysateDeliveryCmdSet.bicarbConvFactor = bicarbConvFactor;
     dialysateDeliveryCmdSet.sodium           = sodium;
     dialysateDeliveryCmdSet.bicarbonate      = bicarbonate;
-    //dialysateDeliveryCmdSet.substitutionRate = 0.0F;
+    dialysateDeliveryCmdSet.substitutionRate = 0.0F;
 
 #ifndef TEST_UI_ONLY
     sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD, (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
@@ -644,7 +644,7 @@
 {
     if ( TRUE == dialysateDeliveryCmdSet.start )
     {
-        //dialysateDeliveryCmdSet.substitutionRate = qs;
+        dialysateDeliveryCmdSet.substitutionRate = qs;
 #ifndef TEST_UI_ONLY
         sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD,
                      (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );