Premiere Pro :: Cannot Import 2.5K Blackmagic DNG Files Into CC

I recently moved to CC in order to be able to work with Blackmagic's DNG raw files inside Premiere Pro. The move was successfull, I could work with such files. However, all of a sudden, I cannot import them into Premiere Pro. First, I cannot select the files and import them as a sequence, because the box will not activate.
  
Second, when I click on the folder containing the files, Premiere tries to import them, but then an error message appears saying "file format not supported".
  
I have seen other discussion threads about failures to import Blackmagic Cinema POCKET raw files, but I am working with files from the 2.5K Blackmagic Cinema Camera, which should give no trouble. In fact, as I said, I was perfectly able to work with them.
 
I have introduced no changes in my computer or the CC Suite, so this sudden error is all the more puzzling. The wav file will get imported, but none of the DNG files will.