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Microsoft KB Archive/107061

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Knowledge Base

Article ID: 107061

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Advanced Server 3.1
  • Microsoft Windows NT Workstation 3.1

This article was previously published under Q107061


After you edit Windows NT Remote Access MODEM.INF, PAD.INF, or SWITCH.INF file, you receive the following error message:

Error 661: The device .INF file is missing a command.


The "command" and "command_init" line in the .INF files must be in all uppercase. If they are written lowercase or mixed case, you will receive the above error message.


All command lines in MODEM.INF, PAD.INF, and SWITCH.INF should be in all uppercase. They must be listed as "COMMAND" and "COMMAND_INIT" exactly.

Usually, Windows NT configuration files are not case-sensitive. No other commands lines in the RAS .INF files are case sensitive. However, as a precaution, you should specify all your RAS commands in upper case.


Microsoft has confirmed this to be a problem in Windows NT and Windows NT Advanced Server version 3.1. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: prodnt

Keywords: kbnetwork KB107061