How do I convert CATIA V5 R21 files to V5 R20?
I got a tutorial for you to convert a higher version file to lower version. Suppose you are using V5R21, you can save it as a V5R20-V5R6.
Click on Tools->Utility
Double click on "downward compatibility"
Click "member"- select the file to convert
At the top select the version to which you want to convert the file- set the target folder- click "run"