Rolly, yes the cpu power supply was changed. El, thought the same, moved rails in before I changed the Hatch Proximity Switch interrupters, is what SEES calls them, yeah it can be called an inductor, in February. All new relays again, New RB1. DZ is up. Checked RV relay in COP, it's working fine, tried even to jump the contacts (a sagging voltage) and make a run, failed. I could understand if it didn't make a perfect run up or down, mis-level, no doors, wrong speed, miss a slow down, not stepping. But it's doing it all right ONCE in either direction. even multiple floors PI is also changing correctly. Floor passing gong works. I hate to think that the contract chip went bad. Usually when they go bad they are done NOW, not intermittent. But its definitely something now. I'll be working on it today and not till next TUE but I'll let all know. Thanks for the help.