Win 8.1, Lightroom 6.7, Nikon D7100, firmware C 1.03
Even after 'roundig up the usual suspects', i.e. restarting, changing ports, using empty SD card, etc., Lightroom doesn't recognize the Nikon D7100.
Tethering works fine in Capture One.
Try removing the SD card completely so that images are saved to directly computer.
Good idea but didn't work unfortunately.
Following are some instructions that will fix your issue:
Retrieving data ...