Microsoft KB Archive/266314

= OS/2 Programs May Not Work When Calling DosCreateCSAlias =

Article ID: 266314

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q266314



SYMPTOMS
Multiple-threaded OS/2-based programs that call the DosCreateCSAlias function may occasionally not succeed and may generate a general protection (GP) fault. When this occurs, you receive an error message stating &quot;An OS/2 program caused a protection violation&quot; with a hexadecimal register list. The error message also states &quot;The program will be terminated,&quot; with the name of the program in the title bar.

All other OS/2-based programs that are running are halted until you click OK to quit the program that stopped working.



CAUSE
DosCreateCSAlias takes a data segment selector as input and creates an aliased code segment selector for that data segment.

There is a very small time window in the code for DosCreateCSAlias in which the data segment could become unmapped and inaccessible. If another thread in the program tries to touch the data segment during this time window, that thread does not succeed and generates an access violation.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:   Date      Time   Size     File name  Platform -  24/06/00  01:28  443,664  Os2.exe    Intel



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

Keywords: kbhotfixserver kbqfe kbbug kbfix KB266314

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