Unable to find DLL when website runs in IIS

Question

When I run the website locally using my VS, everything works.

I am calling a function inside a dll using P/Invoke. DLL is in C++ and it works.

When I deploy the website on IIS, I get the error message

Unable to load DLL 'SolvingProbelm.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

The dll resides inside the bin folder. App pool is Classic and .net 2.0

Any suggestions will be appreciated.

Regards

Answer 1

I had faced the similar problem once. Just copy SolvingProbelm.dll to C:\WINDOWS\System32 . Hopefully, it will work! It had worked in my situation. Actually native DLLs and .Net DLLs are searched differently. IIS searches native DLLs in C:\Windows\System32 folder also. So copying your DLLs there solves problems!

Answer 2

I know it's been 10 years. But if someone should encounter the problem again, just make sure that Platform and Configuration have not changed in Project Properties under Build . In my case, Visual Studio had simply changed the Platform to All Platforms even though I had built all dlls before using Any CPU .

Answer 3

Today I faced this same problem with a software a little bit old (ASP.NET). As you can see here:

Finally I found the explanation to my problem here How do I get IIS to load a native DLL referenced by my WCF service? Please, take a look it solved all my doubts.