Thanks for the reply. I am running my cluster with a single Bat file and its almost identical to yours except no antminer details as i have BFL hardware. And im not a huge miner anymore. Haven't added hardware in months. 400GH is peanuts now. lol . I have not deleted my bfgminer.conf.

Its stange that i had it happen a week ago, then nothing. Then twice again this weekend.