Could you try to crop/resample the volume to be smaller and try how much memory it needs then? Can you allocate a lot of swap space (keys say 100GB) and see if it helps?
sorry for the confusion. I never looked at my Swap settings before. I use LVM+ LUKS so i created a separate swapfile with 20 GB and high priority. Also adjusted the swappiness to 10. How ever the still the program crashes on those steps. Also new swap partition not even close to get full when the program crashes.