Index: leahi_dialin/td/treatment_delivery.py
===================================================================
diff -u -r49df2acfce84b66e4f272714329a756be5651c45 -r67ccfb76335b04e7135bf908a8c2b3b09ac96fbd
--- leahi_dialin/td/treatment_delivery.py	(.../treatment_delivery.py)	(revision 49df2acfce84b66e4f272714329a756be5651c45)
+++ leahi_dialin/td/treatment_delivery.py	(.../treatment_delivery.py)	(revision 67ccfb76335b04e7135bf908a8c2b3b09ac96fbd)
@@ -236,15 +236,15 @@
         @return: None if not successful, the version string if unpacked successfully
         """
         major = struct.unpack('<B', bytearray(
-            message['message'][self.START_POS_MAJOR:self.END_POS_MAJOR]))
+            message['message'][MsgFieldPositionsFWVersions.START_POS_MAJOR:MsgFieldPositionsFWVersions.END_POS_MAJOR]))
         minor = struct.unpack('<B', bytearray(
-            message['message'][self.START_POS_MINOR:self.END_POS_MINOR]))
+            message['message'][MsgFieldPositionsFWVersions.START_POS_MINOR:MsgFieldPositionsFWVersions.END_POS_MINOR]))
         micro = struct.unpack('<B', bytearray(
-            message['message'][self.START_POS_MICRO:self.END_POS_MICRO]))
+            message['message'][MsgFieldPositionsFWVersions.START_POS_MICRO:MsgFieldPositionsFWVersions.END_POS_MICRO]))
         build = struct.unpack('<H', bytearray(
-            message['message'][self.START_POS_BUILD:self.END_POS_BUILD]))
+            message['message'][MsgFieldPositionsFWVersions.START_POS_BUILD:MsgFieldPositionsFWVersions.END_POS_BUILD]))
         compatibility = struct.unpack('<I', bytearray(
-            message['message'][self.START_POS_COMPATIBILITY_REV:self.END_POS_COMPATIBILITY_REV]))
+            message['message'][MsgFieldPositionsFWVersions.START_POS_COMPATIBILITY_REV:MsgFieldPositionsFWVersions.END_POS_COMPATIBILITY_REV]))
 
         self.ui_version_info_response_timestamp = 0