Looks like this is bug #5126551, "DUMP IN KKDCACR() FROM QUERY ON TABLES WITH FK CONSTRAINT" It's so new it looks like it does not have any resolution at this point. Anyone else chasing this one? Any workarounds? This one really makes me wonder about Oracle's QA processes....they never ran queries on tables w/ FK constraints?? Yikes! -Mark -- Mark J. Bobak Senior Oracle Architect ProQuest Information & Learning For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled. --Richard P. Feynman, 1918-1988