Hello Mac3D,
I am not aware of people having the same symptoms as what you are describing.
Especially the full computer restart, usually when something goes very wrong it is either the engine that crashes or GPU drivers.
- Can you give more details on how it restart? Are you on windows? do you get a blue screen?
- Does it behaves the same if you work with other revit files or other content in the engine?
- What is your Unreal version? Revit Version?
- How big are the scene you are importing?
- Could you share with us the log files you will find in your project/saved/logs/ folder
- What type of computer do you have? how old is it? which gpu? how much ram? how much space on your drives? Are your OS and GPU drivers up to date?
- what do you see when you monitor your resources in the task manager while editing your scene and trying to freeze the application?
Bests,
Flavien.