Clarification....Engine Running??

[GileraDNA]

Ignition on, engine off. Power supply connected.

That’s it

1. How about if you don’t have a power supply (CTEK, etc...)?
2. I’ve run into a situation where when I do “READ ECU” with engine off, I don’t get a full return of all of them in the SVT pane? What causes that?

with simple charger is to low amps your CTEK have 5-7AMPS. minimum required bmw 50AMPS for coding and diagnostic. 
For example you can buy expensive like gys flash 100.12 or other solution buy server power supply and made by you self. (just use google how to make power supply many info even here is exist this information) i made my own power supply from server power supply. And already updated i-level of my g30