Deleting the currently active MF-database.
The operator mf_close_db deletes the currently active MF-database.
After using the operator mf_close_db, the MF-database, which has been read last (if available), will be activated.
If an MF-database is active, the operator mf_close_db returns the value TRUE. Otherwise an exception is raised.
mf_features, mf_db_generation, mf_read_db, mf_interprete_image, mf_compute_energy
mf_db_generation, mf_read_db, mf_set_db, mf_get_db