Home/ Questions/Q 8277043
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-08T08:34:22+00:00

I’ve got a web site that sporadically throws the following error: Server Error in

  • 0

I’ve got a web site that sporadically throws the following error:

Server Error in ‘/’ Application.

Could not load file or assembly ‘ICSharpCode.SharpZipLib, Version=0.85.3.365, Culture=neutral, PublicKeyToken=1b03e6acf1164f73’ or one of its dependencies. The located assembly’s manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Now I know that I do have a dependency on this DLL, but I have version 0.85.5 on my system. I have systematically deleted every older version of the DLL from the server, recompiled everything and republished. But no matter what I do, it seems that after every republish, the first one or two times that someone visits the site, they get this error. Then after refreshing once or twice, the error goes away and the site functions as normal.

What makes it even more weird is if I look at the line of code where the error is thrown:

URLRewriter.ProcessRewritingResult(status, excludedEnum, siteName, viewMode, relativePath);

URLRewriter is a class from a 3rd party package (Kentico CMS – CMS.URLRewritingEngine.dll). I ran Dependency Walker on that DLL and found no dependencies whatsoever on ICSharpCode.SharpZipLib.

Any ideas how to fix this?

EDIT: At @JeremyThompson’s suggestion, I ran Process Monitor to catch the error. Here’s a screen dump, with relevant pieces highlighted (and one folder name obscured for privacy reasons). You can view it full size by right-clicking on it, etc…

enter image description here

EDIT: Here’s a load trace from the error. Does this help?

=== Pre-bind state information ===

LOG: User = MY-SERVER-12\Administrator

LOG: DisplayName = ICSharpCode.SharpZipLib, Version=0.85.3.365, Culture=neutral, PublicKeyToken=1b03e6acf1164f73
(Fully-specified)

LOG: Appbase = file:///C:/inetpub/wwwroot/MySite/

LOG: Initial PrivatePath = C:\inetpub\wwwroot\MySite\bin

Calling assembly : CMS.WebAnalytics, Version=6.0.4377.2467, Culture=neutral, PublicKeyToken=834b12a258f213f9.

===

LOG: This bind starts in default load context.

LOG: Using application configuration file: C:\inetpub\wwwroot\MySite\web.config

LOG: Using host configuration file: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet.config

LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework64\v4.0.30319\config\machine.config.

LOG: Post-policy reference: ICSharpCode.SharpZipLib, Version=0.85.3.365, Culture=neutral, PublicKeyToken=1b03e6acf1164f73

LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/9760eb69/275bb3db/ICSharpCode.SharpZipLib.DLL.

LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/9760eb69/275bb3db/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.DLL.

LOG: Attempting download of new URL file:///C:/inetpub/wwwroot/MySite/bin/ICSharpCode.SharpZipLib.DLL.

LOG: Attempting download of new URL file:///C:/inetpub/wwwroot/MySite/bin/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.DLL.

LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/9760eb69/275bb3db/ICSharpCode.SharpZipLib.EXE.

LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/9760eb69/275bb3db/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.EXE.

LOG: Attempting download of new URL file:///C:/inetpub/wwwroot/MySite/bin/ICSharpCode.SharpZipLib.EXE.

LOG: Attempting download of new URL file:///C:/inetpub/wwwroot/MySite/bin/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.EXE.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Now I know that I do have a dependency on this DLL, but I have version
    0.85.5 on my system. I have systematically deleted every older version of the DLL from the server, recompiled everything and republished.

    Sounds like the ‘dependency’ is expecting the OLDER version of the DLL. Why not REPLACE all copies of the NEWER version (0.85.5) on your system, with the OLDER version (0.85.3.365)? (Make sure to check both the ‘bin’ folder of your web application and the ‘GAC’: c:\windows\assemblies)

    If you need, you can download the older version here: http://sourceforge.net/projects/sharpdevelop/files/SharpZipLib/0.85.3/

    NOTE:

    • After replacing the DLL, stop IIS and clear all Temporary ASP.Net
      files. E.g.:
      C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET
      Files
    • ALSO: Remember to update your Visual Studio Solution so that it
      references the older version.

    Cheers

    Pete

    • 0