| Print filter has mismatch of AddRef/Release calls to pipeline manager interface |
Application Verifier break message
Print filter has mismatch of AddRef/Release calls to pipeline manager interface
Probable cause
The Windows Driver Kit (WDK) states that print filters must perform accurate reference counting in their implementation of the IUnknown::AddRef and IUnknown::Release methods. The lifetime of the print filter objects depends on accurate reference counting. If the reference counting is inaccurate, it can result in a resource leak or lead to the premature unloading of the plug-in which will cause the driver to fail.
This verifier stop occurs when a print filter incorrectly manages the reference count of the pipeline manager interface.
Information displayed by Application Verifier
Format:�-� Interface %s ref count is %d, expected %s.
Parameter 1�-�Filter CLSID pointer.
Parameter 2�-�Not used.
Parameter 3�-�Not used.
Parameter 4�-�Not used.
Additional information
Test Layer:�PrintDriver
Stop code:�0000D020
Severity:�Error
One-time error:�no
Error report:�Break
Log to file:�yes
Create backtrace:�yes