Microsoft KB Archive/170374

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Article ID: 170374

Article Last Modified on 10/30/2006


  • Microsoft Windows NT 3.51 Service Pack 5
  • Microsoft File and Print Services for Netware 3.51

This article was previously published under Q170374

IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information on how to do this, view the "Restoring the Registry" online Help topic in Regedit.exe or the "Restoring a Registry Key" online Help topic in Regedt32.exe.


After applying Service Pack 5 for Windows NT 3.51, any Microsoft Mail postoffices that are shared using File and Print Services for NetWare (FPNW) may experience errors. External.exe may log an error [012] when delivering mail to the postoffice. Dirsync.exe may not run automatically, and may generate a warning [154]. When you perform a manual DirSync, the postoffice will receive updates but will not send any updates to other postoffices.


A problem was introduced while attempting to improve an OS/2 file-date issue.


Two workarounds are available.

Method One

One is to edit the registry to disable the file caching for FPNW. This should have only a minor effect on performance.

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" online Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" online Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

  1. Run Regedt32.exe.
  2. Locate the following key in the registry:


  3. Choose EDIT and select ADD VALUE.
  4. Type the name of the value as:


  5. Set the type to REG_DWORD and enter 0 (zero) for the value.

Method Two

The second possible alternative is to replace two files from Service Pack 5 with two files from Service Pack 4 or the original File and Print Services for NetWare disks.

  1. Locate the following two files on the affected server:

    Fpnwsrv.sys (System32\Drivers)
    Fpnw.dll (System32)

  2. Rename the files to something like Fpnwsrv.sp5 and Fpnw.sp5.
  3. Copy the same files from Service Pack 4 or the FPNW disks to the appropriate directories.
  4. Restart the server.


Microsoft has confirmed this to be a problem in Windows NT version 3.51. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Keywords: kbbug kbfix KB170374