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This article was originally published as a Tip of the Week.
QM applications can set a print unit into mode 3 to direct the output to the $HOLD file or to another specific destination file. Sometimes it is useful for other components of the application to be alerted to creation of a print file.
When using a mode 3 print unit, QM will check for the existance of a catalogued subroutine named HOLD.FILE.LOGGER and, if found, will call this when the print unit is opened and again when it is closed.
The subroutine takes three arguments: