jacob1:

ok, based off of what cracker64 said, when things go off the screen and you try to save, that's what causes the crash. Things like PHOT get invalid coordinates like this often, so certain things will make it crash more. Clearing the sim, and loading the save then saving it before things go off the screen should make sure there is no crash, until the next version is out.

By off the screen, I think that means even out of the range off the 4 spaces of particle deletion too, so don't worry about it, clearing the sim before saving will always work, and you may not even need to do that.

 Ye, its looks like that, because in my simulation i have photon emitter, which emit photons outside of sim, and when Im trying to save in this moment - TPT crashes! Ok thx!

ITS BACK!!!!!11111111

This error apears again!

Now I dont know, reason, it happens in a very simple simulation with piston engine. There was no photons, that moves outside of simulation, nothing strange in it. Also this happends, when you trying to save simulation under new name too!!

Spottred one interesting property, in one my save TPT crashes every time, if I heat some pumps on it. 100% crash every time, if heat some pumps from 3 to 15 pressure.

Hehe wait a bit....

Ohohoho, it crashes anyway! I can just open it, and press save and TPT crashes