Microsoft KB Archive/221547

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RPC Server Encounters Invalid Page Fault When a Large Array of Structure Is Passed on Win9x

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Q221547

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The information in this article applies to:


 * Microsoft Windows 95
 * Microsoft Windows 98

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SYMPTOMS
On a Windows 95- or Windows 98-based computer, if you have a sufficiently large array of structure as an OUT parameter of a Remote Procedure Call (RPC), the RPC server may encounter an invalid page fault.

CAUSE
An out-of-memory condition is not handled properly in the RPC code. If the amount of the allocation request for the OUT parameter exceeds the available virtual memory, the RPC server causes an invalid page fault because of incorrect out-of-memory handling code.

RESOLUTION
A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to computers experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next update that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web (WWW):

"http://support.microsoft.com/directory/overview.asp"

The English version of this fix should have the following file attributes or later:

  File name    Version      Date       Time     Size -  Dcom95.exe  4.71.1015.0  03/29/99   02:44p  1,223,904 (win95) Dcom98.exe 4.71.1015.0  03/29/99   02:43p  1,223,904 (win98)

STATUS
Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article.

The fix described in the "Resolution" section should not be applied to computers that do not have one of these products installed.

MORE INFORMATION
NOTE: The problem described in the "Symptoms" section affects all products of the Windows 9x product line, including Microsoft Windows 98 Second Edition, and so on.

Additional query words: fault large array

Keywords : kbnetwork kbAPI kbRPC kbSDKPlatform kbSDKWin32 kbOSWin95bug kbOSWin98bug kbGrpDSNet

Issue type : kbprb

Technology : kbWin95search kbWin98search kbWin95 kbWin98