ok, well problem solved;
I have a "scripts"folder in my gtav root directory and one that I called "Vscripts", to be able to remove or reinstall scripts faster.
That was a bad Idea, my "Scripts" folder was empty, so no scripts were functional, but I had some in my "VScripts" folder,, and that was giving me these crashes.
once "VScripts" folder empty, and scripts back in "Scripts" folder, no more crashes changing character and all scripts working fine.
Sorry for my stupidity and this almost useless topic