Cannot create RDF Views

I’m trying to create an RDF View with:

EXEC ('SPARQL ’ || DB.DBA.R2RML_MAKE_QM_FROM_G (‘http://localhost/r2rml’));

The command ends in milliseconds and creates an empty transient graphs. When I “sparql” on that graph I get:

Virtuoso 37000 Error SP031: SPARQL compiler: No one quad map pattern is suitable for GRAPH ?_::default_3_1 { ?s ?p ?o } triple at line 3

Could you please help debugging this?

I guess this is related to: R2RML Import: validation error
Sorry for the noise!