I have both the DCS R1 and H1. I get the error in the R1 and use the H1 to format the Mem sticks 1 and 2 GB pro duo. Why the sticks format ok in the H1 and not the R1 is a real mystery? The problem seems to be random for all the Sony cameras. My chips can both be formated in my fiends DSC 717 but not in the 828, and can be formated on my PC. I got the error in the H1 when doing a review of my shots. I could advance forward in the review ok but not backwards and would again get the error. I was able to download the photos to my PC and format the chip on the pc. I must conclude that this is a random compatability problem that Sony refuses to acknowledge for which there is no fix.

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