When I try to open a raw file produced by my Nikon D70100, I get this message from my Photoshop CS5.1
"Could not complete your request because the file appears to be from a camera model which is not supported by the installed version of Camera Raw".
Does anyone know what to do???
The D7100 requires Camera Raw plug-in version 7.4 or higher. Your CS5.x can only host up to ACR 6.something so you either need to buy a payfor upgrade to a newer version of PS (CS6 or CC) or use the free DNG Converter to make DNGs from your NEFs and open the DNGs in an older version of PS/ACR.
The DNG Converter can be found, here:
The cheapest option for PS-CC is the Photography Bundle for $10/month:
CS6 is still available, here: