Hi Wim,
May be I can explain why there are 2 different files NSRealtime and NSDRealtime.
The NSRealtime files are created by the NSlog program, made by Jim McMurry. You have received information about this from me a while ago.
The NSDRealtime files are created by an NSBackend program made by Henkka. This program is derived from NSlog. These files are needed for a script that he made. Unfortunately, this program did not always work as well and sometimes caused malfunctions in my case.
Both programs need the Nexstorm software to work.
Brgds,
Oebel