I have had this now on 2 computers, the same error. I'll work on a scene, go back to it a day or so later and it can't open it. Not every scene does this happen to but some.

This is the first time in so many years that I've had any such problem, and I am concerned it is a crap shoot to try to work on a big scene and then not be able to open it again.

it is ' An End of the file error occured when executing open...'

 

Has anyone seen this before?