Microsoft KB Archive/171352

= Large Data Transfer Using WinSock Over SPX May Not Work =

Article ID: 171352

Article Last Modified on 1/20/2007

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APPLIES TO


 * Microsoft Windows 95
 * Microsoft Windows 98 Standard Edition

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This article was previously published under Q171352



SYMPTOMS
When you are attempting to use the Windows Sockets (WinSock) interface to transfer large blocks of data using the SPX protocol, the transfer may not work. When this problem occurs, the program being used to transfer the data may appear to have stopped responding (hung). Depending on the configuration, this problem may occur when the size of the data block exceeds 15-40K.



CAUSE
The Windows Sockets IPX/SPX Protocol Driver (WSIPX) may not allocate enough internal resources to allow large blocks of data to be received successfully.



RESOLUTION
This issue is resolved by the following updated file for Windows 95 and Windows 95 OEM Service Release 2 (OSR2), without the Winsock 2 update installed, and later versions of this file:

WSIPX.VXD version 4.00.956 dated 7/8/97 14,545 bytes

This problem can also occur if you are running Windows 98, or have installed the Winsock 2 update for Windows 95/98. There is currently no resolution for this problem in Windows 98 or when using the Winsock 2 update.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows 95 and OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression tested and should be applied only to computers 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.

Microsoft has confirmed this to be a problem in Microsoft Windows 98 and in the Winsock 2 update for Microsoft Windows 95 and Windows 98.



MORE INFORMATION
The updated component allows up to 64K of data to be successfully sent and received in a single block.

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

ARTICLE-ID: 159254

TITLE : Windows Sockets Applications Using WSIPX May Fail

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

ARTICLE-ID: 161020

TITLE : Implementing Windows 95 Updates

For additional information about Windows 98 and Windows 98 Second Edition hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:

206071 General Information About Windows 98 and Windows 98 Second Edition Hotfixes

Additional query words: hang hangs

Keywords: kbhotfixserver kbqfe kbapi kbnetwork kbprb kbwinsock KB171352

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