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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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