[Virtuoso-users] dump_graphs() error

I've been trying to use the dump_graphs() function from to dump the RDF contents of my virtuoso database, and I've been getting the following error: [willig4@sam db]$ cat /tmp/dump.txt dump_graphs('/tmp/dump', 1); [willig4

[Virtuoso-users] Internal error: quad storage metadata are lost

Hi, When i try to execute: sparql PREFIX rdfs: Select ?o where {SERVICE {?s rdfs:label ?o }} The above query gives me following error SQLState: 37000 Message: SQ074: Line 1: SP031: SPARQL compiler: Internal