> > [...]
> > Any general wisdom about debugging in the acl environment would be
> > welcome.  I've read the debugging.html.
> >
> 
>

Debugging idiomatic Lisp programs is different from
debugging Lisp programs written in a C-style.

I have found "stepping" to be of use in debugging C programs,
or in programs translated from C to Lisp.  (Basically,
a sequence of assignment statements). But not for
"native" lisp.

Tracing of functions is, in my experience, far more
useful in Lisp, because (my) Lisp programs tend to be
applications of functions, more easily understood
by looking at the arguments-->results maps.

RJF