Microsoft KB Archive/101814

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Knowledge Base

PC Win: Network File Locking Problems

Article ID: 101814

Article Last Modified on 10/30/2006


  • Microsoft Mail Client 3.0
  • Microsoft Mail Client 3.0
  • Microsoft Mail Client 3.2

This article was previously published under Q101814


Some peer-to-peer networks may have difficulty locking files in versions 3.0 and 3.2 of Microsoft Mail for Windows. Common error messages caused by insufficient file locks are:

Your message file could not be opened. To access your message file in its current location, mail requires that the MS-DOS utility SHARE.EXE be run before Windows is started.


You do not have the proper access to the postoffice. Please contact your system administrator.


Another machine is already signed in with the user name you have entered. Sign out from the other machine and try again.


Some possible causes of the above errors are as follows:

  • Allocated file space for SHARE.EXE is insufficient.
  • The number of files that can be locked at one time is insufficient.


To remedy this problem, load SHARE.EXE on the server storing the postoffice with the following command-line options:

share /F:16384 /L:255

For more information on SHARE.EXE, see your Microsoft MS-DOS documentation.

Additional query words: 3.00 3.00b 3.20

Keywords: KB101814