I assumed the bioperl-db I was working on was recent, turns out it's not and it turns out somebody seems to have removed that constraint, so if I am all wrong just ignore me... Elia-quiet-in-a-corner ;) -- ******************************** * http://www.fugu-sg.org/~elia * * tel: +65 6874 1467 * * mobile: +65 9030 7613 * * fax: +65 6777 0402 * ********************************