Dmitry,
thanx for your reply. Do you mean system permissions?
What I did was that I verified system hard drive – it appeared to have some issues, so I fixed it with Disk Utility. No effect. Then I exported my project and imported under a Guest user in Resolve – no effect again. Though I do can save that project and change it, grabbing a still crashes Resolve. Created a test project with a small piece of the original timeline – no problems with taking stills.
Is there a way to check permissions on the project file itself in Finder?
Artem