OK, will try debug 1044, only on V2 interface.
Just to clarify, when doing this the lights come on, on the dash. It appears to be getting comms then dropping out?
There are also some other weird issues with HEX-V2 where it appears to disconnect from the laptop (as if I'd unplugged it) and then reconnect. Device Manager shows the interface vanishing and reappearing.
This only happens when reading the Navigation system 37. I've also seen hangs when trying to read the mobile phone unit 77.
None of this happens with the HEX+CAN.