I have a program, which used NETlink to call Mathematica functions from C#. When we compile this program with .NET 4.0 or higher we get "An unhandled exception of type 'System.AccessViolationException' occurred in Wolfram.NETLink.dll"

And trace here:

System.AccessViolationException was unhandled HResult=-2147467261 Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt. Source=Wolfram.NETLink StackTrace: at Wolfram.NETLink.Internal.Win64MathLinkAPIProvider.MLNextPacket(IntPtr link) at Wolfram.NETLink.Internal.Win64MathLinkAPIProvider.extMLNextPacket(IntPtr link) at Wolfram.NETLink.Internal.NativeLink.NextPacket() at Wolfram.NETLink.WrappedKernelLink.NextPacket() at Wolfram.NETLink.KernelLinkImpl.WaitForAnswer() at Wolfram.NETLink.MathKernel.Compute()

Any thoughts?

  • $\begingroup$ If you want help with this please edit your question and provide a bare bones/cut down example of the Mathematica code and the C# calling code. A [mcve] is required to reproduce the problem to apply troubleshooting and diagnose the root cause. $\endgroup$
    – WolframFan
    Aug 31, 2016 at 10:59

1 Answer 1


AccessViolationException is explicit : somehow your program is accessing memory that it doesn't have right to access (didn't allocate for ex).

Since it' s in the another library, you're probably passing bad arguments to the .NETLink . or (less likely) the library contains a bug ...


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