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Asked: 2026-05-22T01:21:02+00:00

I have a windows service application, running under WinXPe, which sometimes fails with an

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I have a windows service application, running under WinXPe, which sometimes fails with an error and displays an message box to the user:

“The instruction at “”
referenced memory at “0x00000000”. The
memory could not be “read.” Press OK
to exit the program

If the user clicks “Ok” the service is restarting.

I have tried to catch all unhandled exceptions with registering a eventhandler at AppDomain.CurrentDomain.UnhandledException
in the handler I log the exception details and exit the application.
But the error I mentioned above is NOT handled from “UnhandledException”.

The application is heavily multi threaded, using System.Threading.Timer and System.Threading.Thread. And it’s using some third party libs, one of these libs are using native interop, I have no source of the native lib.

I tried to point out the error with an debugger attached, but the error doesn’t show up 😉
The application has to run several days before the error occurs.

I need a way to handle such a error.

Thanks

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1 Answer

  1. Editorial Team

    See Vectored Exception Handling

    This is part of windows SEH (Structured Exception Handling) and IIRC here is precious few errors that you could not at least be notified of in such a case.

    You will probably want to write any handling code directly to the native WIN32 API (in unsafe/unmanaged code) and using pre-allocated (static?) buffers only, because there will be many things unreliable at that moment in time.

    Beware of/stay away from threading, locking primitives, memory allocations, disk IO; preferrably use Windows default API’s to, e.g. restart the process or produce a minidump and things like that

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