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Speed/Display issues/unfamiliar error messages, crashes/hangs or any other problems regarding Archicad (Example: I get an error message when the 3D Window is generated, please help!).
Note: If your problem seems to be an Archicad error please always report it to your local reseller!

Moderators: ejrolon, Barry Kelly, Karl Ottenstein, LaszloNagy, gkmethy

That 'can not read plan' message can mean that you are trying to open a newer version file (say 23) in an older version (say 22).

If you open through the FILE menu in Archicad, the open dialogue box will show you the file version when you select it.