When you run a program that uses Windows sockets over the IPX/SPX protocol to transfer large quantities of datagrams, you may receive either of the following error messages: Also, your computer may stop responding (hang), or the client process on the remote computer may report transmission errors. Note that this problem is more likely to occur with slower computers.

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This problem can occur if a buffer being used by a Windows sockets program is inadvertently freed twice by Windows Network Sockets for IPX (WSIPX) and the IPX/SPX-compatible protocol (NWLINK) then tries to access this buffer.

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This problem no longer occurs in Windows 98. To resolve this problem, install the current version of Windows. For information about the current version of Windows, visit http://www.microsoft.com/windows (http://www.microsoft.com/windows).

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This problem is known to occur in conjunction with database backup operations using Sybase SQL Anywhere Network Server Version 5.5.01.

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The third-party product discussed in this article is manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

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