Index: firmware/App/Services/DDInterface.c
===================================================================
diff -u -r9c833ef5623ce842267e284d958820ac0dc3a7fc -r927dfd6e109af46160e5aef687f1b7c286d24703
--- firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision 9c833ef5623ce842267e284d958820ac0dc3a7fc)
+++ firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision 927dfd6e109af46160e5aef687f1b7c286d24703)
@@ -7,8 +7,8 @@
 *
 * @file    DDInterface.c
 *
-* @author  (last)      Praneeth Bunne
-* @date    (last)      27-May-2026
+* @author  (last)      Varshini Nagabooshanam
+* @date    (last)      15-Jun-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -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 ) );
@@ -614,7 +614,7 @@
 {
     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 ) );
 #endif