How to troubleshoot why nanoserver is failing

[bendu]

I'm trying to migrate my application from server core base image to nano server base image to reduce the image size. However, the container just exists with exit code -1073741515 which seems to suggest some dependency is missing. Are there tools or error logs I can check to help troubleshoot?

The application based on dotnet core, but I think some of the package dependencies are written in C++, which is where I suspect needs additional dependencies.

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[jsturtevant]

You can use something like https://learn.microsoft.com/en-us/sysinternals/downloads/procmon to identify the missing dll loads. You can run it on the host and will get the events from the container.

[bendu]

@jsturtevant Thanks for the help. I was able to track CreateFile and LoadImage calls to identify what dlls were getting loaded.

However, I'm now getting an error message like " ---> System.DllNotFoundException: Unable to load DLL 'somedll.dll' or one of its dependencies: The specified procedure could not be found. (0x8007007F)"

From what I can tell in procmon, it tried to load ole32.dll a second time from the application folder and then loaded faultrep.dll (which I'm guessing means the application gave up)

Are there other tools I can use to determine if there is a specific OS API function that's missing?

[ntrappe-msft]

@deverouxmartin-msft FYI