Hi I wasn't doing autocalibration, but I too get this message about Motor Overcurrent. My Bachmann Class 37 is on a DC track. The profile and everything loaded and I got sounds. However the loco didn't move. When I tried to reload the profile, after completion, I got the overcurrent message and the App has lost connection to the decoder (Bluetooth). Nothing I do seems to get it back. Is that the end of the decoder. Sorry if this is all a newbie question. Steven