In low-memory situations this is a valid error message; for instance, if
PrintMonitor needs more memory allocated to it, or if there is not enough
available RAM to launch PrintMonitor. But if the suggested memory size for
PrintMonitor is adequate, and there is plenty of RAM for PrintMonitor to
expand, this error message indicates there is a problem with the
PrintMonitor application.
When trying to print in the background under System 7, a "Not enough
memory" error might indicate a damaged PrintMonitor application. When this
occurs, install a new copy of PrintMonitor from the Install 1 disk. Either
install this file using the Installer program, or simply drag it over. The
waiting print jobs will print as soon as you install the new PrintMonitor.
You may also want to run Disk First Aid, but this isn't always necessary.
To avoid this kind of damage to PrintMonitor in the future, upgrade your
system software with the System 7 Tune-Up. Revised LaserWriter drivers in
the Tune-Up prevent PrintMonitor from getting damaged as it occasionally
did before. The current version of System 7 Tune-Up is 1.1.1.