Faulting application w3wp.exe

Question

I have a application written in ASP.NET which uses DllImport to reference a dll written in Delphi. On my Windows 7 dev machine using the asp.net Development Server accessing the ddl works as expected.

However on a Windows Server 2008 Production Server running IIS 7 the dll return the error "Page cannot be found" and the following error pops into the Application log:

Faulting application w3wp.exe, version 7.0.6002.18005, time stamp 0x49e023cf, faulting
module ntdll.dll, version 6.0.6002.18005, time stamp 0x49e03821, exception code
0xc0000374, fault offset 0x000afaf8, process id 0xab8, application start time   
0x01cc6947b1bb081b.

How to solve this or how can I find a deeper cause?

Answer 1

Just a hunch but you could try enabling 32bit worker process. It's more compatible that 64bit and might help. Is your local server 32bit?

 %windir%\system32\inetsrv\appcmd set config -section:applicationPools -applicationPoolDefaults.enable32BitAppOnWin64:true

Failing that this might help debug the issue.

Troubleshooting IIS7 Worker Thread Crashes (w3wp.exe) with a Faulting Module of ntdll.dll

There's also a thread here with an identical issue. They suggest that adding a reference to kernel32.dll resolved the issue.

Calling unmanaged code from ASP.NET in IIS7

Update

Some people report that copying your dependencies to Windows\System32\Inetsrv resolves the issue. It's worth a try.