Thanks Paul, good technique to know.

<snip>
I remember using a sample technique: try to change the DSPF which cannot
be done when open..

of course is not 100% because this is a generic msgid that could have many

reasons... bu the method could be improved...


this sample code could fit your need ?

CHGDSPF FILE(LIB/MyDispf) TEXT('check if used...')
MONMSG MSGID(CPF7304)EXEC(GOTO KO)
/* this is executed when the file is unlocked */

CALL myProgram
RETURN

/* this is executed when the file is locked */

KO: SNDMSG MSG('CANNOT RUN NOW')
RETURN
</snip>
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