"Error Loading the TCP MIB Library" error when you add a standard TCP/IP printer port in Windows XP and in Windows 2000

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This article was previously published under Q261302

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SYMPTOMS

When you use the Add Standard TCP/IP Printer Port Wizard in Microsoft Windows XP or Microsoft Windows 2000, you may receive the following error message:

Error loading the TCP MIB library.

When you click OK, you receive the following additional error message:

Specified port cannot be added. Operations could not be completed.

When you click OK, the Add Standard TCP/IP Printer Port Wizard quits, and no port is added.

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CAUSE

This behavior may occur if a third-party version of the Wsnmp32.dll, Ntprint.dll, Tcpmib.dll, Mgmtapi.dll, or Snmpapi.dll file has been copied to the %SystemRoot% folder.

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RESOLUTION

To resolve this behavior, rename or delete these files in the %SystemRoot% folder. These files are taking precedence over the Microsoft-supplied file in the %SystemRoot%\System32 folder.

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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MORE INFORMATION

The Add Standard TCP/IP Printer Port Wizard checks the root system folder for some dynamic-link libraries (DLLs) before it checks the System32 folder.

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