Index: HDDefs.h
===================================================================
diff -u -rad5247f9ac263850c86ca43edd7fa462816a3e91 -r01ed3842b4ee776b8d81a3b47a9cf0063469c97c
--- HDDefs.h	(.../HDDefs.h)	(revision ad5247f9ac263850c86ca43edd7fa462816a3e91)
+++ HDDefs.h	(.../HDDefs.h)	(revision 01ed3842b4ee776b8d81a3b47a9cf0063469c97c)
@@ -408,6 +408,7 @@
 enum Heparin_States
 {
     HEPARIN_STATE_OFF = 0,                                              ///< No heparin delivery is in progress
+    HEPARIN_STATE_STOPPED,                                              ///< Heparin delivery stopped by alarm or not yet started
     HEPARIN_STATE_PAUSED,                                               ///< Heparin delivery paused
     HEPARIN_STATE_INITIAL_BOLUS,                                        ///< Initial heparin bolus delivery in progress
     HEPARIN_STATE_DISPENSING,                                           ///< Gradual heparin dispensing in progress
Index: MsgDefs.h
===================================================================
diff -u -rd28027b83afa69852315c2c91383e3978fe11a63 -r01ed3842b4ee776b8d81a3b47a9cf0063469c97c
--- MsgDefs.h	(.../MsgDefs.h)	(revision d28027b83afa69852315c2c91383e3978fe11a63)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 01ed3842b4ee776b8d81a3b47a9cf0063469c97c)
@@ -329,6 +329,8 @@
     REQUEST_REJECT_REASON_RINSEBACK_MAX_VOLUME_REACHED = 27,            ///< Rinseback volume maximum has been reached - no more additional rinsebacks allowed
     REQUEST_REJECT_REASON_UF_VOLUME_NOT_SET = 28,                       ///< Ultrafiltration volume is not set yet
     REQUEST_REJECT_REASON_NO_PATIENT_CONNECTION_CONFIRM = 29,           ///< The user has not confirmed patient connection
+    REQUEST_REJECT_REASON_HEPARIN_PAUSE_INVALID_IN_THIS_STATE = 30,     ///< Heparin cannot be paused if not currently deliverying Heparin
+    REQUEST_REJECT_REASON_HEPARIN_NOT_PAUSED = 31,                      ///< Heparin cannot be resumed if not paused
     NUM_OF_REQUEST_REJECT_REASONS                                       ///< Number of settings change reject codes
 };
 typedef enum Request_Reject_Reasons REQUEST_REJECT_REASON_CODE_T;       ///< Type for settings change rejection reason codes enumeration