UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support Suddenly getting error "No locks available"

Sorry, I am running 7.3.1.

The problem was that the config file got overwritten to 0 bytes. Not sure how that could have happened as no one was working in the forum backend at the time. Once I restored the config file all was ok.

But we are still getting the sporadic:

"No input file specified."

Any idea what that might be?