I have tried 4 times to load a scene I saved in 4.5.
With the cartoon render, I at least get to the error report, but it stalls out during the save. With the no lights cartoon render, it just closes, no warning. I tried in default render and the same thing - it closes out.
I am on windows 7, 32 bit. This scene file I rendered several times in various lighting in the previous version ( not the last one, but the one before ).
I will try to load the scene from scratch, do all the work over and see if it is just an error between versions… some kind of reading glitch. But so far.. not really happy that I have to.