Sorry for the late reply guys,

After I triple checked everything a zillion times, I decided to see what happened after a flight/run. But unfortunately I had to wait a few weekends until the weather was acceptable. After the first run the things works flawless again. These ecu's work in mysterious ways !
Only stupid guess I can make is that the memory chip/IC -thing or whatever lacked back-up power or whatever.[&:]
(Many turbine & ecu manufacturers are probably p...ing themself laughing now..)
Anyway, it works so I'm happy.
Thanks for all your input guys

Regards,
GJ