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

Hi there, and thank you for taking the time to read this
I realized that my game crashes extremely often when I change character to michael or Franklin, and almost only in that case, especially if one of them is in his car (replaced).
I have no crashes using their car as long as I don't change character, and this doesn' t happen when I change to Trevor, whose default car is also replaced.
I have only have something like a dozen replacer and a dozen add-ons, last gameconfig for unlimited add-ons.
These crashes make me sick, I ll give all my everlasting gratefullness plus20 euros to the one who has a fix for that...

Thank you all

last game version and scripthook
i7 7700k
gtx1080ti gaming x
32 gb ddr4

do you have a modified gameconfig.xml for addons for the game version u' re using? if not check that first.

@LexTalionis
Hi, I seem to encounter the same problem you have had ("tuning parts showed up in LSCustom /trainer, but when i apply it, It's disappearing car's body") , so I' m really interested in your trick to fix it if you' d please agree to share it...

@Whats-a-Username- first of all, thanks a lot for replying.
I actually did that, using 252 for modkit id, it seems it' s the only one i could use in this carcols.ymt, before that i could not even upgrade my engine, now I can, and i even can try to change parts, but it just don't show and even makes the original textures it should replace disappear.
It's like the tuning parts would be registered but not loaded.

Not if you do it correctly.
Always make a back up before anything.

hey guys,
i m trying replace a bike that has originally no tuning parts (the carbon rs) with one that has.
I followed Reyser' s replacer tutorial, the bike spawns correctly, but i' m unable to make tuning parts to work, even the statmods (engine, brakes...),
i tryied a few modkit id's supposed to be free but it won t work,
any idea please??
well, now i got statmods update working, but tuning parts aren' t showing, if i change the value for chassis with a trainer, the chassis just disappear, i' m kind of lost here, I tried so many things...

Awesome tutorial, really, works great.
There 's just something I don' t understand how to do...
I'd like to replace a bike that has no tuning parts with one that has,
for instance the carbon rs with imtaj' s awesome gsxr 1000 tunable.
I'm pretty sure it should be possible, but I don' t find what is linked to this carbon rs in any carcols file.
Any idea please ?