modelsim error 211

The Modelsim Reference Manual Lists all of the exit codes

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211 Segmentation violation (SIGSEGV)

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Basically, Modelsim has crashed.

It is probably something in your code causing the crash (when it shouldnt).

I see you are compiling with the -2008 vhdl switch.

Any chance you can post all the code here so we can try?

Otherwise you'll need to raise a ticket with Mentor (and you wont see an update until altera issue a new version).