Привет!
Кажется ситуация прояснилась, думаю что сдох шнур.
Вот мое свежее письмо хорошему человеку:
Tonight I flashed successfully another Exx unit, via both vas-pc and odis.
But I can't flash any Cxx unit, tryed two.
But today, when failed Fxx re flashing failed (via vas-pc)...it took very looooong time.
I have also found adapter error in vas-ps self diagnosis, "700.2108 not ok ". I have found some posts that it's about k-line.
So, my theory:
1)older Cxx units flash via k-line
2)newer flash via can, but if flash-fail conditions it wants to flash via Kline, which seems broken in my vas5054.
What do you think about it?

В общем сегодня могу подьехать к тебе - попробуем.