FIX: "FileNotFound" Error Message When You Run a Managed Application Under High Stress

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Article ID: 815999 - View products that this article applies to.
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When you run a managed application under high stress, you may receive the following error message:
Exception: FileNotFoundException
Description: File or assembly name System.Data, or one of its dependencies, was not found.


A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next .NET Framework service pack that contains this hotfix.

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 about support costs, visit the following Microsoft Web site:
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 typical 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 has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version       Size       File name
   03-Apr-2003  22:31  1.0.3705.419    196,608  Aspnet_isapi.dll
   03-Apr-2003  22:31  1.0.3705.419     28,672  Aspnet_wp.exe
   03-Apr-2003  21:29  1.0.3705.419    303,104  Mscorjit.dll
   04-Apr-2003  10:20  1.0.3705.419  1,953,792  Mscorlib.dll
   03-Apr-2003  21:30  1.0.3705.419  2,269,184  Mscorsvr.dll
   03-Apr-2003  21:30  1.0.3705.419  2,269,184  Mscorwks.dll
   04-Apr-2003  10:25  1.0.3705.419  1,191,936  System.web.dll


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


Article ID: 815999 - Last Review: October 26, 2013 - Revision: 2.3
  • Microsoft .NET Framework 1.0 Service Pack 2
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