[ChrisF30]

Thanks.
Yes, this is why I changed the connection to F20 and use a F30 FA to VO code it.
Yes, I also generate a NCD using Coding-Verification instead of coding mine CAFD manually at the end.

VO coding is failing because there is something in your FA file that is invalid for NBT. For example this also occurs if you try to VO code 3AG rear camera on a HU_ENTRY that does not support it.
Try to compare your FA with an FA from a newer car with ID5 stock and adjust you FA file. If this doesn't work you can also generate an NCD using Coding-Verification instead of coding your CAFD manually.