Started a carve and when board was measuring length got the error. Retried same result. Checked the board, looked ok but I made a new one using the planer with same result. Narrow board so tried a wider one with same result. Tried same board in another machine and no prob. Watched and saw it happened every time when the board was feeding to the left and as it touched the outfeed roller it would stop and the error occurred. Tested head pressure and had 82 lbs, checked both rollers individually and they were identical 72 lbs. Checked the roller and it rolled easily, seemed to be the same as another machine by feel. On a whim I sanded the top edge at the end of the board rounding it. When it touched the roller it went thru ok and the carve ran ok. Removed the keypad end panel and worked the roller up and down while blowing air from every angle at the end of the roller..
Put it all back together and have run multiple carves ok. Never had anything like this, have had compression switch failures. Hope it saves someone else a headache.