> In other words, it (M.) does seem to be working. But it can only do so much.
Thanks for that Raul. Obliged, as ever. I suppose if one wanted total reliability in this respect, it would be best to write one's own memoization routine (probably still an adverb, though). OK, back to re-installing J now... ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
