What are the causes and solutions of exception code c0000005 in mscorwks.dll?

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Fatal Engine Execution Error and an access violation are both symptoms of the same problem. FEEE is raised when the .NET garbage collector detects that the internal structure of the garbage collected heap is destroyed. An access violation is a hardware exception, raised by the processor when it is asked to access memory with an invalid address. A common cause of an AV is heap corruption.

These kind of mishaps are very commonly caused by unmanaged code. It is also quite common for unmanaged code to have latent memory management bugs that can go unnoticed for a long time. The kind of damage the bug can do tends to be quite random. Just running it on another operating system which has a different memory allocation pattern can be enough to trigger the bomb.

You have an excellent candidate for the source of the trouble. You’ll need to work with the COM server vendor or author to chase the bug.

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