Switching cards between two HMC150s

[digexpressions]

I've had two HMC150s for about 6 months now. The other day I went and put a card into my B camera (that had been recorded on using my A camera). The thumbnails appeared when I went into play mode. But when I tried to play a clip it said that it was not playable. Any ideas?

 

[Barry_Green]

Probably had a different recording mode set. Go into the menus and change the playback format to match the format of the clip that's on the card.