Hi Fabian;

DEBUG comand only works in VFP, why dont you try something like this:

lAnyError=.f.
lcOldError = ON('ERROR')
On ERROR lAnyError = .T.
DEBUG
If  lAnyError
    Wait window "I am running at .EXE file " nowait
    return
Endif
On ERROR &lcOldError

..Or, Try something that can be recognized only at VFP !

CLAUDIO