I reformatted my card twice with the pc and once with the book port, and = still, after copying everything back to it from a folder on the hard = drive where I had dumped everything, I still kept getting the out of = drobj structures message. I have two folders, mp3 and text and realized = that I was only getting that message while moving around in the text = folder, and never in the mp3 folder. The other error, "error accessing = index file" was also common during this occurrence. I then began deleting everything in the text folder and even when all = the files were gone, I still kept getting the error message. However, = once I deleted the text folder itself (I think using the pc), the error = was gone. I then recreated the text folder, and resent my files fresh, = instead of copying them from the folder where the _dd the ix and the aa = files were being stored. Now all is well. That leads me to believe that it wasn't the amount and length of = filenames, nore a problem with the card since I had reformatted it three = times, but rather a corrupt file, either text or system in the text = folder, which caused the problem. Hope this helps in tracking down this issue. Don