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PRB: "Can not Access File 'AssemblyName' Because It Is Being Used by Another Process" Error Message in ASP.NET

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Article ID:324519
Last Review:February 19, 2007
Revision:3.3
This article was previously published under Q324519

SYMPTOMS

You may receive the following error message in ASP.NET:
Parser Error Message: Can not access file 'AssemblyName' because it is being used by another process.

Source Error:
Line x1: <add assembly="System.Drawing, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
Line x2: <add assembly="System.EnterpriseServices, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
Line x3: <add assembly="*"/>
Line x4:</assemblies>
Line x5:
NOTE: In this error message, the words "can not" are a misspelling for the word "cannot."

You receive this error message if the following conditions are true:
•The assembly that is specified in the error message is a signed assembly and is not installed in the Global Assembly Cache (GAC); instead, the assembly is in the Bin directory of the ASP.NET Web application. -and-

•Your ASP.NET Web application has just been restarted.

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CAUSE

This problem occurs because signed assemblies in the Bin directory are not supported.

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RESOLUTION

To work around this problem, install the assembly to the GAC.

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STATUS

This behavior is by design.

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APPLIES TO
•Microsoft .NET Framework 1.1
•Microsoft .NET Framework 1.0
•Microsoft ASP.NET 1.1
•Microsoft ASP.NET 1.0

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Keywords: 
kberrmsg kbqfe kbprb kbpending kbhotfixserver KB324519

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