Is there something about Maxima in Sage 2.5.x?  I have tried to use it
(in the Mac PowerPC pre-compiled versions) to no effect in both x=0
and x=3.  Here are some commands and their results.  Needless to say,
I have had no luck trying to do something as intense as
differentiating - it just generates a longer traceback.
I assume the problem lies with myself/my computer, not Sage (unless
Sage is having trouble accessing certain of its packages/documents,
see PS), but I'm stumped as to why it can't start Maxima when the
other packages seem to be fine.  Thanks for any help.

kcrisman

2+2
4
singular('2+2')
4
gp('2+2')
4
maxima('2+2')
---------------------------------------------------------------------------
<type 'exceptions.TypeError'>

/Users/.../<ipython console> in <module>()

/Applications/sage-2.5.3-powerpc-osx-PowerMacintosh-Darwin/local/lib/
python2.5/site-packages/sage/interfaces/maxima.py in __call__(self, x)
    372     def __call__(self, x):
    373         import sage.rings.all
--> 374         return Expect.__call__(self, x)
    375
    376     def __init__(self, script_subdirectory=None, logfile=None,
server=None):

/Applications/sage-2.5.3-powerpc-osx-PowerMacintosh-Darwin/local/lib/
python2.5/site-packages/sage/interfaces/expect.py in __call__(self, x)
    534             return x
    535         if isinstance(x, basestring):
--> 536             return cls(self, x)
    537         try:
    538             return self._coerce_impl(x)

/Applications/sage-2.5.3-powerpc-osx-PowerMacintosh-Darwin/local/lib/
python2.5/site-packages/sage/interfaces/expect.py in __init__(self,
parent, value, is_name)
    763             except (TypeError, KeyboardInterrupt,
RuntimeError, ValueError), x:
    764                 self._session_number = -1
--> 765                 raise TypeError, x
    766         self._session_number = parent._session_number
    767

<type 'exceptions.TypeError'>: Unable to start maxima (maxima failed
to start during this SAGE session; not attempting to start again)

PS Also seem to be some other issues with getting code via ? and/or ??
(relevant error:
    411         if defln:
--> 412             out.write(header('Definition:\t')
+self.format(defln))
generating
<type 'exceptions.TypeError'>: cannot concatenate 'str' and 'NoneType'
objects) but my guess is that whatever the underlying problem is
likely will fix both; in both cases Sage/Ipython seems to be having
trouble finding or starting certain components of itself.


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