Hi Andras, do you mean you have a .3dm file that is 160MB in size?

I'd say that is rather unusually large, not really a normal sized file.

You will definitely need plenty of system memory (RAM) to work with such a large file - it takes additional memory for things like the display mesh of a surface, so while running it can require many times more than just the file size worth of data.

If MoI is freezing during load, it is probably trying to load it but it is going very slowly because you have run out of system RAM and it is now swapping to disk which slows thing down very much.

- Michael