System.IO file not found

Using Vista, 64 bit, VS 2008.  Had some 32 bit DLLs that I needed to use in web service.  To get around the 64 bit vs 32 bit conflict for these DLLs, I set "Enable 32 Bit Applicatins" to true for the application pool.  I published the application and then run the application from localhost.  The 64 vs 32 bit conflicts were resolved. 

However, a new problem now popped up.  I get the following error:

System.IO.FileNotFoundException: The specified module could not be found. (Exception from HRESULT: 0x8007007E)

I am not using System.IO in the web service.  Any ideas of what is happening?  Thanks.....

2/11/2009 10:45:50 PM 12495 articles. 0 followers. Follow

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It seems that CLR cannot load 32 bit assembly on 64 bit system.

After we configure IIS to run 32 bit applications, IIS stores 32 bit DLLs in the %windir%\syswow64\inetsrv directory. You can try to put these dlls in that directory.

For more information, see Running 32-bit Applications on 64-bit Windows(


I look forward to receiving your test results.

Thomas Sun
Microsoft Online Community Support

Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question.
2/16/2009 5:09:32 AM

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