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I have telrik Q3 ( latest version) and after the abnormal shutdown i am continuously facing that error.

Could not load file or assembly 'Telerik.Web.UI' or one of its dependencies. The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))

I also reinstall the telerik but problem is not resolved. Any one please help me.

Bilal lilla
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1 Answers1

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The temp files that is created by IIS or the built-in Visual Studio development server might cause such problems. Close Visual Studio and try finding your project in one of these places and delete the folder:

C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files
C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files

(Adjust according to the framework you use for the project)

As suggested by Chris Herring, also try deleting files inside this folder:

C:\Users\%USERNAME%\AppData\Local\Temp\Temporary ASP.NET Files

You might also want to remove the website cache:

C:\Users\%USERNAME%\AppData\Local\Microsoft\WebSiteCache

If that still does not solve the problem, deleting all temp files as suggested by Arun CM could be a final option:

%TEMP%

You can open these folders quickly by clicking the Start menu, pasting it in the search field (Win7, Vista) or through the Run option (XP), and hitting enter.

Eirik H
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  • there is no folder in these places ... what i do now – Bilal lilla Jan 06 '12 at 09:28
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    I had to delete the files in this directory for a similar error C:/Users/username/AppData/Local/Temp/Temporary ASP.NET Files – Chris Herring Oct 11 '12 at 01:31
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    +1 - just had the same problem with Common.Logging. Sometime I really wish there was a button somewhere labeled "I am a dev, do not use any form of caching of temp file when I work". – SPArcheon Oct 25 '12 at 11:08
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    Just clean the temp files... %temp% in run – Arun CM Mar 04 '14 at 06:27
  • An additional thing to take a look at is the licenses.licx if it exists in the root of your solution. – Eirik H Oct 01 '15 at 09:51
  • I tried all of these solutions with no luck. What ended up working for me was deleting all of the text in the licenses.licx file. – Timbo773 Nov 14 '22 at 17:00