A 2014 golf with mqb system, johnson tool quad, lost all keys. A customer has done all three readings correctly getting immo data with xhorse vvdi key tool plus, the problem is that when he goes to generate the dealer key and then type the key he gets this incorrect file error.
Prepare dealer key need synchronization data from working key
If all keys lost you need to buy sync data from 3rd party.
Check here: how to get sync data