Haas Alarm: 256 (M) CURRENT TOOL UNKNOWN – Current tool information has been lost. This is most likely due to re- initialization. It is likely that the next commanded tool change will result in a collision between the spindle and a tool in a pocket. To eliminate the possibility of a crash, perform Tool Changer Restore. Do not use Power Up/Restart, this will cause the machine to try to return a tool to the carousel.