forum.datacad.com

I am doing some drafting for someone out of state.I have version 21 and he has version 17. Since there is no save as version 17 I was wondering what exactly happens when you go from 21 to 17 and back to 21? Are certain things not compatible between 17 and 21?

They will get a warning about the newer version, and things like Helplines won't work in v17. But, it should work in a general sense.