Hello sheson Want to thank you for your tips. My problems are solved but I want to say little about progress: - first my PS specs: i5 8600K, 16 GB of Venegance RAM, only SSD disks - after your post i tried to find what causes problems, only one thing which I found was Waterflow problems with oldrim files, so i ran Waterflow fix script trough xEdit - after that i had no more problems with Exception in unit process line 85, but i wass stuck with new one, Exception in unit userscript line 331: Access violation at address xxxxxxxx - so I have searched this forums and found it may be Out of Memory problem, I decided to increase virtual memory, - next try ( I think it was 11'th atm) I was looking at complete process with Process Explorer, Everything was fine till 22 minute then I had problem with aplication not responding, - next try I killed all unnecesery processes and added exception to antyvirus , again after 20 min or so Aplication not responding, - Last try I started dyndolod and changed process priority to High, and it was flawless till end OFC every time I have deleted files from output directory and cleared Cache directory. Maybe my solution will help someone in future, anyway I want to thank for your help and for your solid work, Cheers zakkoo