Windows service deployment issue with DLL path

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I have a Windows service that makes use of the EMGU.CV nuget package.

I can install as a web service perfectly happily on my dev machine (Windows 10) with installutil and everything works beautifully.

When I try and install the same service on a server (Windows Server 2012) everything appears okay but I hit an exception as soon as I try to call a constructor from a DLL ...

Outer exception: The type initializer for 'Emgu.CV.CvInvoke' threw an exception.

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

The service is running under the local system account.

I'm sure I'm overlooking something very obvious here, but ...

What I have tried:

I have tried copying the appropriate DLLs into Windows/system32

I've also tried changing the working directory at the top of my OnStart():

Environment.CurrentDirectory = AppDomain.CurrentDomain.BaseDirectory;

Neither has worked.

Posted 5-Sep-19 0:43am

PeejayAdams

Updated 5-Sep-19 0:51am

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phil.o · Answer 1 · 2019-09-05T00:51:00

Solution 1

Maybe that can sched a light on your issue?
SO: Emgu Could not found cvextern in IIS server[^]

Posted 5-Sep-19 0:51am

phil.o

Comments

PeejayAdams 5-Sep-19 7:03am

That looks very useful, thank you. I've been Googling for a more generic solution but it does appear to be something very odd in the EMGU set-up!

phil.o 5-Sep-19 7:11am

You're welcome!