I shoot on a Nikon D7000. Have a Macbook and CS4. Have been using DNG converter for at least a year and today, suddenly...5 files into converting a folder from NEF to DNG, it stopped working. I have restared the program. Restarted the computer. Reinstalled the program. Ran updates on all Adobe software and still no luck. I can't get it to convert a sinlge file from the folder I was working in or any other NEF file on my computer.
Very weird. It worked fine. I had never had a problem with it until today.
Any clue what's happening? HELP!!
I had the same problem. My 2 cent:
(1) Reboot your computer [I work in I.T., this usually fixes all the problems users are experiencing]
(2) Make sure you have space in your destination/source directory where the images are going to be added.
This is what happened to me: I selected my memory card where all the (RAW) images are located. My "save to" location happened to also be my memory card. Basically, I had no more space on my memory card, but I was asking Adobe DNC to convert and save/add those images into the same location, my memory card. Which gave me the exact error message you are reporting.
Fix: I just created a new destiatoin/location on my computer's hard drive where Adobe DNC can save those converted images. Works for me; I hope it works for you.