Vacation did a good job. New energies for the rush towards Cape Town with new manuals and new JGrass. Lots of work to do though.
Finally I migrated the good old profile tool:
which obviously can also be used from console supplying coordinates:
and if you just want the values of progressive and elevation, use a tablewriter (--otable) instead of the chartwriter (--ochart):
And obviously, for those who need to make a profile of an existing feature layer:
1) Select the feature that you want to have the profile from
2) Go to the console view and instead of passing the --coords variable, just pass the featurelayer tag --iflayer-line:
The result is the following:
Seems to be ok.