This isn't the product technical support forum. It's the Lounge.
Moved to Lightroom.
The first thing everyone is going to recommend is that you update to version 5.7.1
Obviously. i made a typo. My version is 5.7.1.
It seems that sony ilce 7m2 RAW files are causing the problem.
I installed Capture One 9 and it imported the files without a problem.