Microsoft KB Archive/103476

= Windows NT Terminal May Disable a COM Port for all VDMs =

Article ID: 103476

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Workstation 3.1
 * Microsoft Windows NT Advanced Server 3.1

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This article was previously published under Q103476





SYMPTOMS
A Windows NT Virtual MS-DOS machine (VDM) cannot open or use a COM port that has the error character enabled. Windows NT Terminal sets an error character and the COM port settings maintain settings across opens, so a VDM can't use any COM ports used by Terminal unless another program has turned off the error character.



RESOLUTION
To enable a COM port used by Terminal for use with a VDM, log off and then log on again, or from Command Prompt, type NET STOP SERIAL followed by NET START SERIAL. Both of these actions will reset the COM ports.



STATUS
Microsoft has confirmed this to be a problem in Windows NT and Windows NT Advanced Server version 3.1. This problem was corrected in the latest U.S. Service Pack for Windows NT and Windows NT Advanced Server version 3.1. 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

Keywords: KB103476

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