problem removing database/model #277

I'm creating several datastore using ncds_new (both NCDS_TYPE_CUSTOM and NCDS_TYPE_EMPTY)
In order for libnetconf to resolve the imports, grouping and augments I'm using both
ncds_add_models_path
and
ncds_add_model (for each yin file)

everything works smoothly and I'm able to send the
ncntf_event_new(-1, NCNTF_BASE_CPBLT_CHANGE, old_cpblts, new_cpblts, NCNTF_EVENT_BY_SERVER);
without any problem.

the problems start if I try to unload the models.
The only way I have to unload them is to use the
ncds_free
and
ncds_free2

but apparently this only remove the datastores but keeps the info added by the ncds_add_model and ncds_add_model_path.
How can I completely clean a model from libnetconf?

thanks