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 c21edf2e..629d2580 100644
--- a/site_ansto/instrument/config/environment/temperature/sct_oxford_itc.tcl
+++ b/site_ansto/instrument/config/environment/temperature/sct_oxford_itc.tcl
@@ -75,6 +75,9 @@ debug_log "rdValue $tc_root ITC503-a result=$data"
             set rslt [scan $data %f data]
 debug_log "rdValue $tc_root ITC503-b result=$data"
           }
+          if { [hpropexists [sct] geterror] } {
+            hdelprop [sct] geterror
+          }
           if {$data != [sct oldval]} {
             sct oldval $data
             sct update $data
@@ -235,48 +238,48 @@ debug_log "rdState $tc_root status($rslt)= X$the_x A$the_a C$the_c S[format %02d
       hsetprop $tc_root/itc500_state my_state "STATE_X"
     }
     if { $nextState == "" } {
-    set my_status "[SplitReply [hgetprop $tc_root/itc500_state my_status]]"
+      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]]
+      set my_driving [SplitReply [hgetprop $tc_root/setpoint driving]]
 debug_log "rdState $tc_root: driving=$my_driving"
-    if {[ catch {
-      set val "[hval $tc_root/setpoint]"
-    } message ]} {
-      set val 0
+      if {[ catch {
+        set val "[hval $tc_root/setpoint]"
+      } message ]} {
+        set val 0
 debug_log "rdState $tc_root: setpoint=failure"
-    }
+      }
 debug_log "rdState $tc_root: setpoint=$val"
-    if {[hpropexists $tc_root/setpoint target]} {
-      set tgt [SplitReply [hgetprop $tc_root/setpoint target]]
+      if {[hpropexists $tc_root/setpoint target]} {
+        set tgt [SplitReply [hgetprop $tc_root/setpoint target]]
 debug_log "rdState $tc_root: target=$tgt"
-    } else {
-      hsetprop $tc_root/setpoint target $val
-      set tgt [SplitReply [hgetprop $tc_root/setpoint target]]
+      } else {
+        hsetprop $tc_root/setpoint target $val
+        set tgt [SplitReply [hgetprop $tc_root/setpoint target]]
 debug_log "rdState $tc_root: initialised target to: target=$tgt"
-    }
-    if {$my_driving > 0} {
-      if {[hval $tc_root/control_sensor] == "3"} {
-        set temp [hval $tc_root/sensor3/value]
-      } elseif {[hval $tc_root/control_sensor] == "2"} {
-        set temp [hval $tc_root/sensor2/value]
-      } else {
-        set temp [hval $tc_root/sensor/value]
       }
-      set tol [hval $tc_root/tolerance]
-      set lotemp [expr {$tgt - $tol}]
-      set hitemp [expr {$tgt + $tol}]
+      if {$my_driving > 0} {
+        if {[hval $tc_root/control_sensor] == "3"} {
+          set temp [hval $tc_root/sensor3/value]
+        } elseif {[hval $tc_root/control_sensor] == "2"} {
+          set temp [hval $tc_root/sensor2/value]
+        } else {
+          set temp [hval $tc_root/sensor/value]
+        }
+        set tol [hval $tc_root/tolerance]
+        set lotemp [expr {$tgt - $tol}]
+        set hitemp [expr {$tgt + $tol}]
 debug_log "rdState driving $tc_root until $temp in ($lotemp, $hitemp)"
-      if {$temp < $lotemp} {
-      } elseif {$temp > $hitemp} {
-      } else {
-        hset $tc_root/status "idle"
-        hsetprop $tc_root/setpoint driving 0
+        if {$temp < $lotemp} {
+        } elseif {$temp > $hitemp} {
+        } else {
+          hset $tc_root/status "idle"
+          hsetprop $tc_root/setpoint driving 0
 debug_log "rdState driving $tc_root finished at $temp in ($lotemp, $hitemp)"
+        }
       }
-    }
-    set nextState idle
+      set nextState idle
     }
   } catch_message ]} {
 debug_log "rdState error: $catch_message"