Overlay Issue - 'Invalid master video'

[ImolaSlicktop]

Hello all,

I apologize if this specific issue has been covered, but a quick search didn't help me out, as many people have different setups to record lap times, etc. Figured it'd be best to just ask.

I recorded some laps at Road America this weekend using my iPhone 6 (upgraded to Grand Prix), GoPro Hero 3+ (silver), and a Kiwi 3 OBDII data sender. Car was an e92 M3. My GoPro died for a few laps but I have several laps saved on Harry's, most of with have a corresponding video. However, when I click "Export," I get the message 'Invalid master video.' There doesn't seem to be anything I can do on this screen to help my case, I can just cancel the overlap/export process. This happens when my phone is connected to the GoPro via wifi as well. It seems I need to set a reference lap, because my videos may be incomplete/absent on the first lap. Is there a way to do something like this manually..?

Can anyone guide me in the right direction, or tell me if/why this setup is somehow incompatible at the moment?

Thanks in advance.
-Brendan

[Harry]

You need to transfer the GoPro footage to the smartphone before you can overlay it. Please read Video Documentation available from www.gps-laptimer.de/documentation. It includes detailed step-by-step instructions for transfer options.

- Harry