I upgraded the firmware of my TL866CS exactly as described on the start of this topic. It worked fine.
The programmer software recognized it as a TL866A, made the autotest as OK..
BUT... When I was trying to use it effectively to just test a logic IC, I got this message.
I also tried to roll back the firmware, but the firmware updater seems to do not have this option.
In other words... NOW, my TL866CS is a TL866A "pirate" that becames useless. ?