Two questions of a Newbie



Hi, everyone.
    It's the first time for me to come here. I'm a newbie yet for Maxima,
and I think I will learn many many things from here :-)

    Well, I have two questions about maxima.

1. Why can't run plot2d in maxima within emacs?
    I'm using GCL maxima and run maxima within emacs. It works properly.
But when I execute plot2d commands, it will cause an error.

(C3) plot2d(sin(x)/x, [x,-30,30]);

Error: Cannot create the file maxout.openmath.
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by CATCH.
Broken at MACSYMA-TOP-LEVEL.  Type :H for Help.
MAXIMA>>

But if I run maxima from xterm, all will be OK.
How to solve this problem?


2. Why C-c C-d can't work?

I heard that within emacs, C-c C-d will get a help system.
But when I use it, it says fail open "menu".

I have setq the maxima-info-dir to /usr/share/info/


Thanks first!


-- 
Hongzheng Wang
Department of Electronics Engineering
Tsinghua University
wanghz02@mails.tsinghua.edu.cn