I've searched for hours on this and haven't found anyone with the same problem.
I purchased two new E-series cards just recently and a used HVX200P purchased in December of 2008. There is less than 30 hours logged on the camera so it's still relatively new.
The camera has worked fine for the last month of use. I was shooting a video just earlier today and all of a sudden got a format err! warning on the P2 card in slot 1. I went into MCR mode to find that clip corrupt so I deleted it. However both slots are giving me a Format Err! warning now when I turn the camera on.
I turned the camera off and on several times with no luck of getting both cards to read properly. Luckily through trial and error, I realized if I stick either card into slot 2 alone and leave slot 1 empty, the card will read. Anytime I have both cards in or just one in the first slot, the camera will read Format Err!
I upgraded the firmware thinking it could be a new E-series issue but no luck there either. I am really stuck on this, I hope the camera slot 1 isn't fried. Is there anything I can do? Has anyone else ever experienced this?