Renato, I apreciate it. The test was easy and just a few minutes. It sounds still unlogical that RFH turns your device off, because the first M71 in RFH is executed isolated.
(Please be aware that RFH seems only preparatory, and after that two RUN are required. The prompts are written in the message windows. The line for RFH is selected with the arrow keys, not by clicking with the mouse on the line. Did you take all this into account?)