Final cut pro crashing, Ideas?

[grooveattack]

Hey guys.
I am having some serious trouble with final cut crashing while editing. Seemingly at random it will lock up and crash. I have attached the crash file if anyone can understand it and let me know what is going on.

I have tried:
Updating to the latest OS
Uninstall and reinstall FCPX
Using proxy media and original contents (thought 4K footage might be causing issue)
having only one library open at a time.
Using different libraries


Any help would be greatly appreciated, its having a big impact on my work.

Thanks!

 

[DavidDoyle]

Have you had a go with these steps? https://support.apple.com/en-gb/HT203477

I've found deleting preference files can help, and the extreme example in that link was to create new projects and copy content etc.