fatal error when opening dwg files

When opening some of my dwg files (not all files, some work noramlly), i get this fatal error message :
"Unhandled Access Violation Reading 0xc37c1411 Exception at 7edf4ch"
Anyone have an idea of how to correct this ? (the files seem to open normally on an other Autocad station, and a scan for errors in the files spots nothing..). Reinstalling software and registry didnt help. Thanks for ur help Nicolas
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