The Coolpix B700 has been supported since Lightroom 9.6 (CC 2015.6), released June 2016.
Latest version of Lightroom CC (2015) does not support it.
The latest version of Lightroom is 2015.12.
The Cloud desktop app is notoriously flaky at times and will sometimes tell you there are no updates when there are.
In Lightroom, click Help > System Info. What Lightroom version is shown in the first line in the white box? I'm guessing it says CC 2015 . If you're truly up to date, it should say CC 2015.12 [ 1125239 ].
If so, update manually, Download Photoshop Lightroom
See Lightroom 6 upgrade to Lightroom 6.12 for full details.
Not sure why my creative cloud has not offered to upgrade to 6... ? It appears that I have 5:
Lightroom version: 5.7.1 
Downloading 6 with the provided link thanks!
Well I ran into this error and there is no such thing as an "ADOBE SUPPORT ADVISOR"!?
Hum I'm really mixed up there is two lightrooms installed version 5 (as above)
And also CC with this version:
Lightroom version: CC 2015.12 [ 1125239 ]
But you say above that it does not support NRW... (Latest version of Lightroom CC (2015) does not support it."
Ah but it does support it.... So I have to use that other version of lightroom Hum...
Thanks for steering me in the proper direction