diff --git a/site_ansto/instrument/config/environment/magneticField/sct_oxford_ips.tcl b/site_ansto/instrument/config/environment/magneticField/sct_oxford_ips.tcl
index f3817e3d..908f3ec8 100644
--- a/site_ansto/instrument/config/environment/magneticField/sct_oxford_ips.tcl
+++ b/site_ansto/instrument/config/environment/magneticField/sct_oxford_ips.tcl
@@ -15,6 +15,9 @@ namespace eval ::scobj::ips120 {
 
 # issue a command to read a register and expect a value response
   proc getValue {tc_root nextState cmd} {
+    if { [hpropexists [sct] geterror] } {
+      hdelprop [sct] geterror
+    }
 debug_log "getValue $cmd sct=[sct] root=$tc_root nextState=$nextState"
     sct send "@2$cmd"
     return $nextState
@@ -138,6 +141,9 @@ debug_log "rdValue new data for $tc_root [sct] result=$data"
 # values in the controller in a sequence intended to transition the controller
 # between states.
   proc getState {tc_root nextState cmd} {
+    if { [hpropexists [sct] geterror] } {
+      hdelprop [sct] geterror
+    }
 debug_log "getState $tc_root $nextState $cmd sct=[sct]"
   if {[ catch {
     set my_state "[SplitReply [hgetprop $tc_root/ips120_state my_state]]"
@@ -719,6 +725,7 @@ debug_log "Registering node $nodeName for write callback"
       hsetprop $scobj_hpath privilege spy
       ::scobj::hinitprops $tempobj setpoint
       if {[SplitReply [environment_simulation]]=="false"} {
+        hsetprop $scobj_hpath/setpoint type drivable
         ansto_makesctdrive ${tempobj}_driveable $scobj_hpath/setpoint $scobj_hpath/sensor/value $sct_controller
       }
     } catch_message ]