Packing Job error

I dragged 25k tracks to my drive. When it was finally done I had a Packing Job error. There are about 100 tracks in the Packing Job list and I verified that they do exist on disk. There is no obvious reason why the files failed. Can you tell me what a packing list is and what can cause EP to choke on files? How do I get these files onto my disk? (These same files did not fail the first time I put my library on this drive.)

Hello @jalderwood, we are assisting you with this issue on the Database corruption questions/rant thread, so I will be closing this one to reduce repetition.