DOCUMENT:Q159254 14-MAR-2002 [crossnet] TITLE :Windows Sockets Programs Using WSIPX May Not Work PRODUCT :Windows for Workgroups and Windows NT Networking Issues PROD/VER:: OPER/SYS: KEYWORDS:kberrmsg kbnetwork msnets win95 kbAPI kbSDKPlatform kbWinsock kbGrpDSNetkbfixlist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows 95 ------------------------------------------------------------------------------- SYMPTOMS ======== Windows Sockets programs that use the IPX protocol in Windows 95 may not work correctly. The program may indicate an "out of memory" error message. One such program is Attachmate Extra Personal Client, which may not finish Setup successfully or generate error messages when it lists servers. After creating a socket, the program's Windows Sockets Bind() call fails with WSAENOBUFS(10055). CAUSE ===== WSIPX calls IFSMGR to allocate memory from IFSMGR's heap. If IFSMGR is out of heap space and the allocation request is for less than one page (4 KB), IFSMGR does not grow the heap because it assumes this is an interrupt time allocation. RESOLUTION ========== This issue is resolved by the following updated file for Windows 95, and later versions of this file: WSIPX.VXD version 4.0.953 dated 11/4/96 14,545 bytes A version of this file that also resolves this problem is included in the Windows Sockets 2.0 Update for Windows 95. For information about obtaining this update, see the following article in the Microsoft Knowledge Base: Q182108 Availability of Windows Sockets 2.0 for Windows 95 The updated WSIPX resolves this problem by calling IFSMGR, when needed, to explicitly grow the heap. 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 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. This issue is resolved in Microsoft Windows 98. MORE INFORMATION ================ For additional information about issues resolved by updates to this component, please see the following article in the Microsoft Knowledge Base: Q171352 Large Data Transfer Using WinSock Over SPX May Not Work For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base: Q161020 Implementing Windows 95 Updates The third-party products discussed in this article are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability. Additional query words: ====================================================================== Keywords : kberrmsg kbnetwork msnets win95 kbAPI kbSDKPlatform kbWinsock kbGrpDSNet kbfixlist Technology : kbWin95search kbZNotKeyword3 Version : : Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.