Elements 10 ships with Camera Raw 6.4.1 and is compatible up to Camera Raw 6.7. Nothing after that.
The D700 requires Camera Raw 5.1 or later so Elements 10 can read those Raw files.
The D4S requires Camera Raw 8.4 or later so Elements 10 will never be able to read those Raw files.
Your choices are to convert the D4S Raw files to DNGs then edit the DNGs in Elements 10. Or upgrade to Elements 12.
I do not want to convert my NEF files to DNG because you lose data.
Where did you get that information from? What kind of data do you lose?
There is no data loss. You have the same image data, just a different file container. At least give it a try for you invest more money in new software. The DNG file is created in addition to your NEF files. So you can evaluate the results and decide what you want to do next. Having said that, newer versions of Camera Raw have improved features that will probably enhance your raw editing capabilities.
ok. Thank you so much for the information. I am going to try it and see what happens.