Hi,

Bill Page reported this issue, which I'm copying here to the
sage-support list, in the hopes somebody will look into it:

sage: var('k, l')
sage: f = real(cosh(sqrt(1/2*k-1/2*sqrt(k^2+4l))))
sage: g = 
f.substitute_expression(imag_part(k)==0,imag_part(l)==0,real_part(k)==k,real_part(l)==l)

# the above is all fine. Then:

sage: g.full_simplify()
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-4-447f098b1880> in <module>()
----> 1 g.full_simplify()

/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/symbolic/expression.so
in sage.symbolic.expression.Expression.simplify_full
(build/cythonized/sage/symb
olic/expression.cpp:35488)()

/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/symbolic/expression.so
in sage.symbolic.expression.Expression.simplify_factorial
(build/cythonized/sage
/symbolic/expression.cpp:37440)()

/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/symbolic/expression.so
in sage.symbolic.expression.Expression._maxima_
(build/cythonized/sage/symbolic/
expression.cpp:5366)()

/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/structure/sage_object.so
in sage.structure.sage_object.SageObject._interface_
(build/cythonized/sage/st
ructure/sage_object.c:4781)()

/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/misc/lazy_import.so
in sage.misc.lazy_import.LazyImport.__call__
(build/cythonized/sage/misc/lazy_impor
t.c:3000)()

/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc
in __call__(self, x, name)
    197
    198         if isinstance(x, basestring):
--> 199             return cls(self, x, name=name)
    200         try:
    201             return self._coerce_from_special_method(x)

/usr/local/sage/sage-6.3.beta6/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc
in __init__(self, parent, value, is_name, name)
    624                 self._name = parent._create(value, name=name)
    625             except (TypeError, RuntimeError, ValueError) as x:
--> 626                 raise TypeError(x)
    627
    628     def _latex_(self):

TypeError: ECL says: THROW: The catch MACSYMA-QUIT is undefined.
sage:



-- 
William Stein
Professor of Mathematics
University of Washington
http://wstein.org
wst...@uw.edu

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