Microsoft KB Archive/162775

= Access Violation in SPOOLSS when Printing to a Serial Printer =

Article ID: 162775

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q162775



SYMPTOMS
If a serial port configuration string greater than 20 characters is specified and that serial port is used by an active printer, Localmon.dll generates an access violation in Spoolss.exe.



CAUSE
This problem can only occur if the following Registry Key is directly edited using a Registry Editor:

If a serial port configuration string greater that 20 characters is entered into this value it will cause Localmon.dll to generate an access violation.

These keys are normally directly configured using Ports in Control Panel. If this application is used, it is not possible to specify a port configuration greater than 20 characters. However, it may be necessary to specify a custom port configuration for some serial handshaking options, which can require a string longer than 20 characters.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt GPF General Protection Fault CPL AV

Keywords: kbbug kbnetwork KB162775

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