Okay. When I have more time, I will test without logging... and that should technically solve it, so thanks.So I don't think this can be solved from WinBoard. It is a problem in the engine. It could be that an engine trying to open its ini or log file runs into the same problem that WinBoard ran into when it tried to open the PGN, and croaks because of that.
If anything else comes up, I'll be sure to let you know. I'll keep running about 4 hour tests... (15,000 games, 1 game per second)... when I have time.If this satisfactory solves it for the PGN file, I guess I will have to implement a similar solution for the tourney file, and perhaps the -loadGameFile. Perhaps I should just replace calls to fopen anywhere by calls to Robust_fopen, and let that do the retries.