Thank you Brian and Bill for your responses. I've nailed my problem more precisely now:
foo=: 3 : 0 a=. x+/y *:a ) shows in the debug window as [0] a=. x+/y [1] *:a which is fine. But I had a verb that I had made rank 1, such as foo=: 3 : 0"1 a=. x+/y *:a ) and this shows in the debug window as [0] 3 : 0"0a=: i.3 4b=: 2a*b) Is this a bug in Debug? My verb ran OK. Regards Graham ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
