>I've never seen problems when leaving SET STEP ON in a production EXE whether or not debug info is included. Have you had a different experience ?

Yep, it would give an error something like "this feature is not available" at the SET STEP ON line on a user machine (no vfp install, just the user runtimes, I mean). Won't show up on development machine.

Haven't actually tested this for a year or two, but that's the way it used to work...