Index: dialin/hd/ui_proxy.py
===================================================================
diff -u -r793aef3c5d08f4c38d44a7c4d881c8f297a84801 -ra83e5728833f7b1ccdfad4b0b3eb3ea40f670d1d
--- dialin/hd/ui_proxy.py	(.../ui_proxy.py)	(revision 793aef3c5d08f4c38d44a7c4d881c8f297a84801)
+++ dialin/hd/ui_proxy.py	(.../ui_proxy.py)	(revision a83e5728833f7b1ccdfad4b0b3eb3ea40f670d1d)
@@ -156,8 +156,8 @@
         # initialize variables that will be populated by treatment parameter ranges message
         self.min_treatment_duration_min = 0
         self.max_treatment_duration_min = 0
-        self.min_uf_volume_ml = 0
-        self.max_uf_volume_ml = 0
+        self.min_uf_volume_ml = 0.0
+        self.max_uf_volume_ml = 0.0
         self.min_dialysate_flow_rate_ml_min = 0
         self.max_dialysate_flow_rate_ml_min = 0
         # initialize variables that will be populated by response from HD to treatment duration change request
@@ -168,7 +168,7 @@
         # initialize variables that will be populated by response from HD to UF change request
         self.uf_change_succeeded = False
         self.uf_change_reject_reason = 0
-        self.uf_change_volume_ml = 0
+        self.uf_change_volume_ml = 0.0
         self.uf_change_time_min = 0
         self.uf_change_rate_ml_min = 0.0
         self.uf_change_time_diff = 0
@@ -213,8 +213,8 @@
         \param message:  response message from HD regarding valid treatment parameter ranges.\n
             U32  Minimum treatment duration setting (in min.). \n
             U32  Maximum treatment duration setting (in min.). \n
-            U32  Minimum ultrafiltration volume (in mL). \n
-            U32  Maximum ultrafiltration volume (in mL). \n
+            F32  Minimum ultrafiltration volume (in mL). \n
+            F32  Maximum ultrafiltration volume (in mL). \n
             U32  Minimum dialysate flow rate (in mL/min). \n
             U32  Maximum dialysate flow rate (in mL/min).
 
@@ -224,9 +224,9 @@
             message['message'][self.START_POS_MIN_TREAT_TIME:self.END_POS_MIN_TREAT_TIME]))
         maxtime = struct.unpack('i', bytearray(
             message['message'][self.START_POS_MAX_TREAT_TIME:self.END_POS_MAX_TREAT_TIME]))
-        minufvol = struct.unpack('i', bytearray(
+        minufvol = struct.unpack('f', bytearray(
             message['message'][self.START_POS_MIN_UF_VOL:self.END_POS_MIN_UF_VOL]))
-        maxufvol = struct.unpack('i', bytearray(
+        maxufvol = struct.unpack('f', bytearray(
             message['message'][self.START_POS_MAX_UF_VOL:self.END_POS_MAX_UF_VOL]))
         mindialrt = struct.unpack('i', bytearray(
             message['message'][self.START_POS_MIN_DIAL_RATE:self.END_POS_MIN_DIAL_RATE]))
@@ -248,7 +248,7 @@
             BOOL Accepted \n
             U32  Reject reason (if not accepted) \n
             U32  treatment duration (min) \n
-            U32  UF volue (mL) \n
+            F32  UF volue (mL) \n
 
         \returns none
         """
@@ -258,7 +258,7 @@
             message['message'][self.START_POS_TIME_CHG_RSP_REASON:self.END_POS_TIME_CHG_RSP_REASON]))
         tim = struct.unpack('i', bytearray(
             message['message'][self.START_POS_TIME_CHG_RSP_TIME:self.END_POS_TIME_CHG_RSP_TIME]))
-        vol = struct.unpack('i', bytearray(
+        vol = struct.unpack('f', bytearray(
             message['message'][self.START_POS_TIME_CHG_RSP_UF_VOL:self.END_POS_TIME_CHG_RSP_UF_VOL]))
 
         self.duration_change_succeeded = rsp[0]