Thanks for the links. Toc191734495 describes much of what I've seen. It also explains how modifiers which ignore x and y arguments preceeded current derived verbs. However, based on my tests, the information there is not sufficient to avoid the value error I initially reported.
1) It isn't just the presence of x or y which creates derived verbs. Derived adverbs must contain (u OR m) AND (x OR y). For derived conjunctions, I assume the first list is (u OR m OR v OR n), but I haven't done a complete analysis. 2) The presence of x only counts in the dyadic form. If a reference of x is present in the monadic form, it is one of the following. If this modifier is immediate, another copy of u for historical reasons. If this is a derived modifier, a reference to the global x. 3) The immediate versions of Adverbs only use the monadic definition, and immediate Conjunctions prefer the dyadic definition. Paul On Apr 11, 2012 4:36 AM, "Henry Rich" <henryhr...@nc.rr.com> wrote: ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm