Positioning character crash (solved!)

Hi, i'm having a crash when selecting the icon Set Object Position (in the scene menu) to place the start point of my chacter. It worked fine before, at least with the free version. I installed the full version several times always getting the same problem on osx Yosemite. Anyone?
tnx

Solved! You have to make the way system before placing the character (maybe in the next version you should add some kind of warning to prevent this).
Thanks anyway!