Microsoft KB Archive/156497

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Duplicate Print Output on PC-LAN Server from Windows 95 Client

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Q156497

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The information in this article applies to:


 * Microsoft Windows 95

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SYMPTOMS
When you print from a Windows 95 workstation to a shared printer on an IBM PC-LAN (PCLP) peer print server, print jobs may randomly be printed twice.

CAUSE
When you print to SMB-based servers that use the Core SMB dialect, the Microsoft Client for Microsoft Networks (VRedir) does not correctly initialize the Spool Header Size and Spool Mode fields in the Open Spool File SMB command. Although other networking products (including Microsoft's) ignore these fields, the IBM PC-LAN peer print server uses the values in these fields as described in the SMB specifications. When these fields are not correctly initialized, the PC-LAN print server may randomly print the submitted job twice.

This symptom does not occur when you print from Windows NT workstations, or when you are using the Windows 95 real-mode client (Net.exe) to connect to the PC-LAN peer print server.

RESOLUTION
This issue is resolved by the following updated file for Windows 95, and later versions of this file:

  VREDIR.VXD  version 4.00.959  dated 9/4/96  140,403 bytes

STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows 95. An update to address this problem is now available, but is not fully regression tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

This issue is resolved in Microsoft Windows 98.

MORE INFORMATION
This update is currently available in English (U.S.) and French versions.

For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base:

Q183493 Batch File Calling CD Command May Not Run on HPFS

Q174371 Possible Database File Damage When Data Is Appended

Q172594 Cannot Connect to Server with 15 Characters and Period in Name

Q167712 Fatal Exception Error in VREDIR with DCOM Program

Q165403 Windows 95 Update Prevents Sending Clear-Text Password Over Net

Q165402 Windows 95 Update to Encrypt Passwords in Memory

Q161100 File May Be Truncated When Copied to a Full Network Drive

Q160807 Cannot Connect to Windows NT Server with Many Shares

Q157114 "Access Denied" Attempting to Run File on LM/X Server

Q152186 Possible Network Data Corruption If Locking Not Used

Q150215 Disabling Automatic Network Shortcut Resolution

Q148367 Possible Network File Corruption with Redirector Caching

Q142803 Locking Error or Computer Hangs Accessing Network Database Files

Q140558 Deleting Files on Samba Servers May Delete Local Files Instead

Q138249 Updated Vredir.vxd Corrects Errors Running Files on LMX

Q138014 File May Be Truncated to Zero Bytes When Copied Onto Itself

Q136834 Error Copying Read-Only Files to Core SMB Server For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

"Q161020 Implementing Windows 95 Updates" Keywords : kbnetwork kbpolicy kbprint win95

Issue type : kbprb

Technology : kbWin95search kbWin95