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Application Verifier break message

Async Notify handle returned by RegisterForPrintAsyncNotifications was not released properly.

Probable cause

A Handle allocated by RegisterForPrintAsyncNotifications was not released until the program exited. Most likely, the handle should be released by calling UnRegisterForPrintAsyncNotifications before exiting.

Troubleshooting steps

  • If Parameter 2 is not NULL, use the dps debugger command to dump the initialization stack trace.

  • To determine the routine that allocated the handle, find the first non-winspool and non-vfPrint module name that called vfPrint!VfHookRegisterForPrintAsyncNotifications (typically found in the 3rd stack frame).

Information displayed by Application Verifier

Parameter 1�-�Handle value.

Parameter 2�-�Initialization stack trace.

Parameter 3�-�Not used.

Parameter 4�-�Not used.

Additional information

Stop code: A020