Hi
[ Note this is the question Gap Undeposited Implementations; I
couldn't seem to reply to that discussion any more]
I'm using Sage 4.3.3 through the terminal. I'm trying to use the Braid
package written by K. Magaard for GAP. I would like to do everything
through Sage, but I'm getting the following error message:
sage: gap.eval('Read("assemble.g")')
' '
sage: g = SymmetricGroup(3)
sage: t = [ g( (1,2) ) for i in range(4) ]
sage: gap.Braid(g,t)
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (47, 0))
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
/homes/home01/a/azsorkin/Desktop/RFG_branched_covers_2009_2010/
braid-1.1/lib/<ipython console> in <module>()
/opt/pkg/sage/local/lib/python2.6/site-packages/sage/interfaces/
expect.pyc in __call__(self, *args, **kwds)
1379
1380 def __call__(self, *args, **kwds):
-> 1381 return self._parent.function_call(self._name,
list(args), kwds)
1382
1383 def _sage_doc_(self):
/opt/pkg/sage/local/lib/python2.6/site-packages/sage/interfaces/
gap.pyc in function_call(self, function, args, kwds)
883 self.eval('$__SAGE_LAST__ := %s;;'%marker)
884 res = self.eval("%s(%s)"%(function, ",".join([s.name()
for s in args]+
--> 885 ['%s=%s'%
(key,value.name()) for key, value in kwds.items()])))
886
887 if gap.eval('last') != marker:
/opt/pkg/sage/local/lib/python2.6/site-packages/sage/interfaces/
gap.pyc in eval(self, x, newlines, strip, **kwds)
478 input_line += ';'
479
--> 480 result = Expect.eval(self, input_line, **kwds)
481
482 if not newlines:
/opt/pkg/sage/local/lib/python2.6/site-packages/sage/interfaces/
expect.pyc in eval(self, code, strip, synchronize, locals, **kwds)
981 try:
982 with gc_disabled():
--> 983 return '\n'.join([self._eval_line(L, **kwds)
for L in code.split('\n') if L != ''])
984 except KeyboardInterrupt:
985 # DO NOT CATCH KeyboardInterrupt, as it is being
caught
/opt/pkg/sage/local/lib/python2.6/site-packages/sage/interfaces/
gap.pyc in _eval_line(self, line, allow_use_file, wait_for_prompt)
720 return ''
721 else:
--> 722 raise RuntimeError, message
723
724 except KeyboardInterrupt:
RuntimeError: Gap produced error output
List Element: <list>[4] must have an assigned value
executing Braid($sage1,$sage7);
sage:
Thanks for the help.
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