What versions of the Firecontrol and THC driver are you running?
Anything in the log? cut n paste this into a File explorer:
%USERPROFILE%.FireControl
then open firecontrol.log
Can you run through the program without error with THC off and plasma OFF? (have a sheet on table).
That error seems to crop up from a torch misfire, let’s assume that it is not interference.
Check your consumables, make sure retaining cap is not over tightened (this is known cause of torch misfire, distorts the swirl ring) and no corrosion (see this thread).