cant complete read out 2019 Eco boost Raptor

Guys,

i try to read out a 2019 Raptor (eco boost 3.5) and it always fails after about 25%. Ford tricks like periodically closing/ opening doors wont help.
tried it with MPV1 and 4.4 or with MPV2 and 4.5 beta, always same results. All goes well and around 22-25% "detection failed"

what gives, where is my mistake?

disconnect the little wire on the neg side of the battery. Thats the battery management system.
Id also suggest connecting a battery charger

i will try that, battery tender was attached