System Lock-up

System Lock-up after 156 turns.
This is the second long game I've played with a similar result...total computer lock-up.
I can repeat the lock-up by moving the same ship to the same planet.
I know this could be difficult to resolve, but I could send the files for your review.

I've even deleted the SEV download and reloaded it again using the two turn old desktop saved files in attempt to resolve the problem...same lock-up results.