do you know how to work on a design which has different version? e.g. i work on inventor 2012. but i want to continue my friend's work from inventor 2014.
There always the danger of "future version" ...older versions can not open the newer made models...but save as step or iges solves this problem..unfortunately some properties (materials, colors etc. get lost in the conversion from original file to iges/step. but you can open each others work.
I agree with Hans. Still, you can not work by modifying the work between the two vesiones of Inventors. It's a shame.