Desktop Printing: Error "-192 at 18" at Startup

When the computer is started, a dialog box comes up saying: "Desktop printer unknown error -192 at 18".

It has an "OK" button to dismiss it, and comes up at every startup, but everything seems normal, and printing from all applications works just fine.

The message is caused by a corrupted print job. The following steps should correct it.

Using the Extension Manager control panel or a corresponding third-party utility, turn off Desktop Printing by unchecking the Desktop Printer Spooler and the Desktop PrintMonitor in the list of extensions.

Restart your computer. You should get a different error message from Print Monitor telling you about a damaged print job. Choose to delete the damaged print job.

Turn Desktop Printing back on by rechecking the components, and restart.

If you have other Desktop Printing issues, check out TIL article# 24306: Mac OS 8: Desktop Printing Troubleshooting, which provides a complete list of troubleshooting steps for Desktop Printing issues.