On Jun 25, 1:10 pm, gsw <[email protected]> wrote:
> Hi,
>
> I suspect you're just running out of RAM.
> Not necessarily physically, but the construction Sage --> expect
> interface --> Maxima --> Lisp implementation is a fragile one. If the
> Lisp implementation "thinks" it runs out of space, this is not handled
> too gracefully by Maxima, and as a consequence the synchronization
> between Sage/the expect interface, and Maxima, gets lost more or less
> often.
>
the Maxima -->Lisp implementation is not especially fragile if you are
using the right lisp, which Sage is probably not.
Some readers may recall that Bill Schelter was largely responsible for
both a particular Lisp (KCL, AKCL, and its successor GCL) as well as a
particular version of Maxima, and Bill tuned them together. People
who change the lisp underneath Maxima do not always have the same
perspective on parts that are unspecified in the standard, and so
bringing Maxima up on a non-GCL version of Lisp, while generally
pretty easy, may differ when (for example) the computation uses up all
the memory.
I believe Sage is using CLISP or ECL, which may be fragile in such
ways.
Downloading a properly configured Maxima on an appropriate Lisp may
solve your problem, if that is your goal.
Using another version of Sage, which likely ALSO will have an non-
optimally configured Maxima is less likely to solve your problem.
If you don't especially want to solve your problem, but prefer to see
if random diddling with Sage makes a difference, try gsw's
suggestions.
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