diff --git a/site_ansto/instrument/config/environment/temperature/mercury_pres.sct b/site_ansto/instrument/config/environment/temperature/mercury_pres.sct
index 3c236387..dce3b77d 100644
--- a/site_ansto/instrument/config/environment/temperature/mercury_pres.sct
+++ b/site_ansto/instrument/config/environment/temperature/mercury_pres.sct
@@ -24,7 +24,8 @@ driver mercury_pres = {
 @    scan [lindex [split "$data" ":"] end] "%s" data
   }
 
-  code Write_function setPoint = {
-  }
+  code Write_function setPoint = {%%
+    # TODO: Check if we can/must put the "mB" on this line
+  %%}
 
 }
diff --git a/site_ansto/instrument/config/environment/temperature/sct_mercury_pres.tcl b/site_ansto/instrument/config/environment/temperature/sct_mercury_pres.tcl
index f83e7601..894a43f0 100644
--- a/site_ansto/instrument/config/environment/temperature/sct_mercury_pres.tcl
+++ b/site_ansto/instrument/config/environment/temperature/sct_mercury_pres.tcl
@@ -227,7 +227,13 @@ proc ::scobj::mercury_pres::setPoint {tc_root nextState cmd_str} {
     }
     set par [sct target]
     set cmd "${cmd_str}${par}"
-# setPoint hook code goes here
+# setPoint hook code starts
+    # TODO: Check if we can/must put the "mB" on this line
+# setPoint hook code ends
+    if { [hpropexists [sct] geterror] } {
+      debug_log ${tc_root} 9 "[sct] error: [sct geterror]"
+      error "[sct geterror]"
+    }
     if { [hpropexists [sct] driving] } {
       if { [hpropexists [sct] writestatus] && [sct writestatus] == "start" } {
         sct driving 1