Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r0244adf04ccc6b154d5c81ecd9b0473584b97509 -rfc7328b2b8158c88e11a063204d7e87519f472ca
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 0244adf04ccc6b154d5c81ecd9b0473584b97509)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision fc7328b2b8158c88e11a063204d7e87519f472ca)
@@ -3032,6 +3032,27 @@
 
 /*********************************************************************//**
  * @brief
+ * The handlePostTxNextCmd function handles a post-treatment next request
+ * message from the UI.
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handlePostTxNextCmd( MESSAGE_T *message )
+{
+    if ( 0 == message->hdr.payloadLen )
+    {
+        requestPostTxNext();
+    }
+    else
+    {
+        sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_HD_2_UI, FALSE );
+    }
+}
+
+/*********************************************************************//**
+ * @brief
  * The sendTreatmentRecircCmdResponse function constructs a treatment re-circulation
  * user action response to the UI and queues the msg for transmit on the appropriate
  * CAN channel.
@@ -3064,6 +3085,38 @@
 
 /*********************************************************************//**
  * @brief
+ * The sendPostTxNextCmdResponse function constructs a post-treatment next
+ * command response to the UI and queues the msg for transmit on the appropriate
+ * CAN channel.
+ * @details Inputs: none
+ * @details Outputs: Post-treatment next command response msg constructed and queued.
+ * @param accepted T/F - was request accepted?
+ * @param rejReason reason why request was rejected (or zero if accepted)
+ * @return TRUE if msg successfully queued for transmit, FALSE if not
+ *************************************************************************/
+BOOL sendPostTxNextCmdResponse( BOOL accepted, U32 rejReason )
+{
+    BOOL result;
+    MESSAGE_T msg;
+    U08 *payloadPtr = msg.payload;
+
+    // Create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_HD_POST_TX_NEXT_CMD_RESPONSE;
+    msg.hdr.payloadLen = sizeof( BOOL ) + sizeof( U32 );
+
+    memcpy( payloadPtr, &accepted, sizeof( BOOL ) );
+    payloadPtr += sizeof( BOOL );
+    memcpy( payloadPtr, &rejReason, sizeof( U32 ) );
+
+    // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
  * The handleTreatmentEndCmd function handles a treatment end user action command
  * message from the UI.
  * @details Inputs: none