updated
now it works
Could have been corrupted thanks!!!

yes, I've uninstalled and installed.

Still the same message:
"Error opening AutoCAD import file: Can't open file
This does not appear to be a valid AutoCad DWG or DXF file or the file is write protected."

Hi
I have the problem that I want to import an dxf-file and make faces. But each time i try to import i get an error message which says that this file has an invalid group code and this is no autocad file. I've tried every fileversion 2007/2004/2000/R12 and dxf/dwg. Can somebody help me??