diff --git a/site_ansto/instrument/config/environment/temperature/sct_oxford_itc.tcl b/site_ansto/instrument/config/environment/temperature/sct_oxford_itc.tcl
index fc1b73b4..90fa8d60 100644
--- a/site_ansto/instrument/config/environment/temperature/sct_oxford_itc.tcl
+++ b/site_ansto/instrument/config/environment/temperature/sct_oxford_itc.tcl
@@ -175,7 +175,7 @@ debug_log "rdState $tc_root state=$my_state, version=$my_model"
       hsetprop $tc_root/itc500_state my_status "[sct result]"
       set my_status "[SplitReply [hgetprop $tc_root/itc500_state my_status]]"
 debug_log "rdState my_status=$my_status"
-      set rslt [scan $my_status "X%dA%dC%dS%dH%dL%d" the_x the_a the_c the_s the_h the_l]
+      set rslt [scan "$my_status" "X%dA%dC%dS%dH%dL%d" the_x the_a the_c the_s the_h the_l]
 debug_log "rdState $tc_root status($rslt)= X$the_x A$the_a C$the_c S[format %02d $the_s] H$the_h L$the_l"
       set auto 0
       if {[hval $tc_root/heater_auto] > 0} {
@@ -199,7 +199,7 @@ debug_log "rdState $tc_root status($rslt)= X$the_x A$the_a C$the_c S[format %02d
       set nextState read
     } elseif {$my_state == "STATE_C"} {
       set my_status "[SplitReply [hgetprop $tc_root/itc500_state my_status]]"
-      set rslt [scan $my_status "X%dA%dC%dS%dH%dL%d" the_x the_a the_c the_s the_h the_l]
+      set rslt [scan "$my_status" "X%dA%dC%dS%dH%dL%d" the_x the_a the_c the_s the_h the_l]
       set auto 0
       if {[hval $tc_root/heater_auto] > 0} {
         set auto [expr {$auto + 1}]
@@ -240,7 +240,7 @@ debug_log "rdState $tc_root status($rslt)= X$the_x A$the_a C$the_c S[format %02d
     if { $nextState == "" } {
       set my_status "[SplitReply [hgetprop $tc_root/itc500_state my_status]]"
 debug_log "rdState my_status=$my_status"
-      set rslt [scan $my_status "X%dA%dC%dS%dH%dL%d" the_x the_a the_c the_s the_h the_l]
+      set rslt [scan "$my_status" "X%dA%dC%dS%dH%dL%d" the_x the_a the_c the_s the_h the_l]
 debug_log "rdState $tc_root status($rslt)= X$the_x A$the_a C$the_c S[format %02d $the_s] H$the_h L$the_l"
       set my_driving [SplitReply [hgetprop $tc_root/setpoint driving]]
 debug_log "rdState $tc_root: driving=$my_driving"
@@ -283,6 +283,7 @@ debug_log "rdState driving $tc_root finished at $temp in ($lotemp, $hitemp)"
     }
   } catch_message ]} {
 debug_log "rdState error: $catch_message"
+      set nextState idle
   }
 debug_log "rdState returns: $nextState"
     return $nextState
@@ -397,12 +398,12 @@ debug_log "halt $tc_root"
       hfactory $scobj_hpath/heater_auto plain user int
       hsetprop $scobj_hpath/heater_auto values 0,1
       hsetprop $scobj_hpath/heater_auto oldval 0
-      hset $scobj_hpath/heater_auto 0
+      hset $scobj_hpath/heater_auto 1
 
       hfactory $scobj_hpath/cooler_auto plain user int
       hsetprop $scobj_hpath/cooler_auto values 0,1
       hsetprop $scobj_hpath/cooler_auto oldval 0
-      hset $scobj_hpath/cooler_auto 0
+      hset $scobj_hpath/cooler_auto 1
 
       hfactory $scobj_hpath/apply_tolerance plain user int
       hsetprop $scobj_hpath/apply_tolerance values 0,1
@@ -526,8 +527,8 @@ debug_log "halt $tc_root"
 proc add_itc500 {name IP port {_tol 5.0} {addr "@1"} } {
   set fd [open "/tmp/itc500.log" a]
   if {[SplitReply [environment_simulation]]=="false"} {
-    puts $fd "makesctcontroller sct_itc500 oxford ${IP}:$port"
-    makesctcontroller sct_itc500 oxford ${IP}:$port
+    puts $fd "makesctcontroller sct_itc500 oxford ${IP}:$port \"\r\""
+    makesctcontroller sct_itc500 oxford ${IP}:$port "\r"
   }
   puts $fd "mk_sct_oxford_itc500 sct_itc500 environment $name $_tol $addr"
   mk_sct_oxford_itc500 sct_itc500 environment $name $_tol $addr