Sorry about that, that last message should, of course, have gone to Helena, not to grassp-list. :-( Martin -- Martin Ameskamp, Inst. f. Informatik I (Computing Dept.) Kiel University, Olshausenstr. 40, 24118 Kiel, Germany Fax: ++49 431 8804054, Voice: ++49 431 8804474, email: ma at informatik.uni-kiel.d400.de