NEMO user manual is available directly on NEMO webpage.

The problem is not the number of file but there heterogenity.

There are 3 output formats of NEMO which are SeaDataNet ODV, NetCDF and MEDATLAS formats, described in the document that you can download application/pdf Specification of SeaDataNet Data Transport Formats.

When I double-click on the launcher_nemo.bat file, a window appears for a very small fraction of second and then nothing else happens.

Make sure that the java version on your computer is ≥ 1.7

It is true with NEMO V1.2.14. Download latest version of NEMO to have a smaller Settings window

Two parameter lists are available in NEMO : P09 (MEDATLAS Parameter Usage Vocabulary) and P01 (BODC Parameter Usage Vocabulary), the parameter list is chosen on the Data screen.

Be aware that there are much more parameters in P01 than in P09. So be sure to use the parameter list which answer your needs.

In order to be unique, the LOCAL CDI_ID,generated using NEMO, is the concatenation of 3 fields

NEMO gives an error during the conversion on one line where you cannot see any obvious error.

While converting the input files, NEMO is able to create a text file that contains all mandatory information for  the generation of CDI XML descriptions.