how can I export a model from 3DMAX to med.thanks!

best best is export as *.3ds.
iTHINK animations have to go through frame by frame

This is easy. Look at the export format list of your modeling tool and check the import format list of MED. Both should share the formats 3ds and FBX, maybe even more. Then try what works best for you.

Since you bought such an expensive modeling software you will probably know the features of this tool. Nobody spends so much money without checking it heavily including read and write formats.

Thank you very much!