What instruction in the code results in this occurring?
Also, what is the state of the following:
SET TALK
SET SAFETY
SET NOTIFY
You can put in something like the following:
MESSAGEBOX("SET TALK =" + SET("TALK"))
... etc.
And it will give you the state, without SETTING STEP ON, which can sometimes alter what you get. (Who was it that said "The act of observation changes the outcome" What that Heisenberg? Oppenheim? My scientist quotes are a little rusty.)
I prefer to test these types of things "live" sometimes and avoid SET STP ON unless there is some kind of syntax or logic error I'm trying to track down.