[Virtuoso-devel] Internal Optimized compiler error

[Ewout V. T. <ew...@on...>]

Hi,

We encountered an "Internal Optimized compiler error" while running a 
sparql query. It is reproducible on http://lod.openlinksw.com/sparql 
(not on http://demo.openlinksw.com/sparql, even though it seems to be 
running the same version of virtuoso).

We are running 7.1.1-dev.3208-pthreads as of Apr 28 2014 (github version 
aac0d973876ed696644eb1f4d0ea76e0f3fcc079).

Virtuoso 37000 Error SQ156: Internal Optimized compiler error : unknown 
table for a column dfe in sqldf.c:1435.
Please report the statement compiled.

PREFIX disq: <http://ns.ontoforce.com/2013/disqover#>
SELECT *
WHERE {
   ?lens a disq:Lens.
   {
     ?lens disq:showProperty ?property_description.
   }
   UNION
   {
     ?lens disq:showGroup ?group.
   }
   ?property_description disq:property ?superproperty.
   ?property rdfs:subPropertyOf* ?superproperty.
}

Regards
Ewout Van Troostenberghe