Hi Walter,
I've already discovered the "--device DARMP" problem but isn't there a difference between DARMP and DARMATS?
I have read the "RXF Getting Started" pdf but not everything was obvious to me. But I might not fulfill the prerequisites.

But in the end it worked except for stopping my blinky programme in debugging mode. But this was not a tool problem. Since I've told you before that my colleague reported he same error a few days later. But in my programme this error occured regularly and in his programme only occasionally. It had to do with a software interrupt (SWI) but we were not able to find the reason therefore.
Thanks for your help.