I’ve a 10 reg 325i
It’s a jap import. Dropped into the main dealer today for its recall and I also asked them to update the maps from Japan to Europe

Problem is when they plugged the USB stick in to do the update nothing happens. Normally it should say “Start update” and you enter the FSC code. But as I said nothing happens
The USB port is in the glove box. We know the USB port works and the stick works because we can transfer music from the USB stick to the head unit

In fairness the lads in the dealership didn’t spend much time at it as they were doing it as a favour.

Any ideas why it’s happening or what needs to be done?