On 2012-12-02, Peter Foelsche <foelsche at sbcglobal.net> wrote:
> Considering that this is a 64bit executable and that the process did
> not come anywhere near the available memory...
Well, an out-of-memory problem probably means you are working with
enormous expressions which have used up the memory allocated by Lisp. It
doesn't usually help to allocate more memory, since the time required to
process such expressions grows too.
So my advice is to figure out how to work with smaller expressions. I
notice you are eventually subsituting some zeros into an expression --
that typically makes it smaller, so can you do the substitution earlier?
(before integrating or differentiating).
best
Robert Dodier