Putting thread in error status from TPS

Is there a way to put a thread into error status from inside a TPS proc similar to PDLs ? I have a proc that needs args and when the thread is started I can return an error if the argument is absent but I need some indication on the GUI like a red color or error on the GUI that indicates the thread error due to TPS proc start error. Error is recorded in the proc log

I have this, but the retrun does nothing to put any indication on the GUI icon for the thread:

if {![ keylget args ARGS.SUFFIX suffix ]} {