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POApp_Code Load Error in WebApp
 

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  1. POApp_Code Load Error in WebApp
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    <p>Earlier this week, recent deployments of our ASP.NET 2.0 web application started to throw the following error at unpredictable (not easily reproducible) times:</p> <blockquote> <p><strong>Parser Error</strong></p> <p><strong>Description</strong>: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.</p> <p><strong>Parser Error Message</strong>: Could not load file or assembly 'App_Code, Version=2.5.0.0, Culture=en-US, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.</p> <p><strong>Source Error</strong>:</p> <pre><code>Line 1: &lt;%@ page language="c#" inherits="OurAppNamespace.Migrated_Index, App_Web_01zualsq" validaterequest="false" maxPageStateFieldLength="500" %&gt; Line 2: Line 3: &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" &gt; </code></pre> </blockquote> <p>Once a deployment starts throwing this error, it doesn't stop until we re-deploy or modify the Web.Config file. Needless to say, we have checked repeatedly and verified that <code>App_Code.dll</code>, version 2.5.0.0, is in the <code>bin</code> directory and has valid permissions.</p> <p>We haven't made any major changes recently, and we've not made any configuration changes, so I am a bit at a loss as to how this issue arose. The cause listed in the error cannot be the problem, because the file exists. I am used to having permissions issues that result in similar errors, but changing file permissions only fixes it temporarily.</p> <p>What is the actual root cause of this error, and how can we fix it?</p>
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    1. USPhilip Hanson
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    1. COTry turning on the Fusion log to get more information about the error.
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      1. POApp_Code Load Error in WebApp
      1. USMichael Liu
    2. CODid you change some reference inside the App_Code.dll? If yes, check if you deploy all your references.
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      1. POApp_Code Load Error in WebApp
      1. USAngeloBad
    3. CO@AngeloBad Good suggestion, but it turns out that none of the references in App_Code.dll have changed, and all of the referenced libraries are present and also have proper permissions.
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      1. POApp_Code Load Error in WebApp
      1. USPhilip Hanson
 

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