How to add path to Modelsim to correct "the design unit was not found"?

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I found it in my (11.1Sp2.dp8) cycloneiii_atoms.v model

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I just rechecked, and I do find it in the 11.1sp1 files too. I must have mistyped something :)

binpersonal: on the Modelsim command line, type 'vmap cycloneiii_ver' and see if the library is mapped correctly. If not, you've messed up your Modelsim library mappings. In that case, I'll try to help you fix it.

Cheers,

Dave