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ERROR: An unexpected error occurred while tokenizing input

Just installed Sage 5.0.1 on Ubuntu 12.04 32-bit. Simple test operations work fine:

sage:1+1 2 sage: expand((1+x)^2) x^2 + 2*x + 1 sage:maxima(console) ;;; Loading #P"/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/ecl/sb-bsd-sockets.fas" ;;; Loading #P"/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/ecl/sockets.fas" ;;; Loading #P"/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/ecl/defsystem.fas" ;;; Loading #P"/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/ecl/cmp.fas" Maxima 5.26.0 http://maxima.sourceforge.net using Lisp ECL 11.1.1 [...]

But errors occur with any plot command that I have tried. See below. What do they mean?

| Sage Version 5.0.1, Release Date: 2012-06-10 |

| Type notebook() for the GUI, and license() for information. |

sage: plot(x,0,1) 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', (2097, 0))

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', (273, 0))

ImportError Traceback (most recent call last)

/home/jakubi/<ipython console=""> in <module>()

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/IPython/Prompts.pyc in __call__(self, arg) 550 551 # and now call a possibly user-defined print mechanism --> 552 manipulated_val = self.display(arg) 553
554 # user display hooks can change the variable to be stored in

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/IPython/Prompts.pyc in _display(self, arg) 576 return IPython.generics.result_display(arg) 577 except TryNext:
--> 578 return self.shell.hooks.result_display(arg) 579 580 # Assign the default display method:

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/IPython/hooks.pyc in __call__(self, args, *kw) 139 #print "prio",prio,"cmd",cmd #dbg 140 try: --> 141 ret = cmd(args, *kw) 142 return ret 143 except ipapi.TryNext, exc:

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/misc/displayhook.pyc in result_display(ip_self, obj) 150 # IPython's default result_display() uses the IPython.genutils.Term.cout stream. 151 # See also local/lib/python2.6/site-packages/IPython/hooks.py. --> 152 print_obj(IPython.genutils.Term.cout, obj) 153 154 def displayhook(obj):

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/misc/displayhook.pyc in print_obj(out_stream, obj) 142 if _check_tall_list_and_print(out_stream, obj): 143 return --> 144 print >>out_stream, obj 145 146 def result_display(ip_self, obj):

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/structure/sage_object.so in sage.structure.sage_object.SageObject.__repr__ (sage/structure/sage_object.c:1496)()

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/plot/graphics.pyc in _repr_(self) 801 """ 802 if SHOW_DEFAULT: --> 803 self.show() 804 return '' 805 else:

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/misc/decorators.pyc in wrapper(args, *kwds) 454 kwds[self.name + "options"] = suboptions 455 --> 456 return func(args, *kwds) 457 458 #Add the options specified by @options to the signature of the wrapped

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/plot/graphics.pyc in show(self, kwds) 1479 else: 1480 kwds.setdefault('filename', sage.misc.misc.tmp_filename() + '.png') -> 1481 self.save(kwds) 1482 os.system('%s %s 2>/dev/null 1>/dev/null &' 1483 % (sage.misc.viewer.browser(), kwds['filename']))

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/misc/decorators.pyc in wrapper(args, *kwds) 454 kwds[self.name + "options"] = suboptions 455 --> 456 return func(args, *kwds) 457 458 #Add the options specified by @options to the signature of the wrapped

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/plot/graphics.pyc in save(self, filename, kwds) 2197 SageObject.save(self, filename) 2198 else: -> 2199 figure = self.matplotlib(options) 2200 # You can output in PNG, PS, EPS, PDF, or SVG format, depending on the file extension. 2201 # matplotlib looks at the file extension to see what the renderer should be.

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/sage/plot/graphics.pyc in matplotlib(self, filename, xmin, xmax, ymin, ymax, figsize, figure, sub, axes, axes_labels, fontsize, frame, verify, aspect_ratio, gridlines, gridlinesstyle, vgridlinesstyle, hgridlinesstyle, show_legend, legend_options, axes_pad, ticks_integer, tick_formatter, ticks) 1677 axes = self.__show_axes 1678 -> 1679 from matplotlib.figure import Figure 1680 from matplotlib import rcParams 1681 self.fontsize(fontsize)

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/matplotlib/__init__.py in <module>() 131 import sys, os, tempfile 132 --> 133 from matplotlib.rcsetup import (defaultParams, 134 validate_backend, 135 validate_toolbar,

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/matplotlib/rcsetup.py in <module>() 17 import warnings 18 from matplotlib.fontconfig_pattern import parse_fontconfig_pattern ---> 19 from matplotlib.colors import is_color_like 20 21 #interactive_bk = ['gtk', 'gtkagg', 'gtkcairo', 'fltkagg', 'qtagg', 'qt4agg',

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/matplotlib/colors.py in <module>() 50 """ 51 import re ---> 52 import numpy as np 53 from numpy import ma 54 import matplotlib.cbook as cbook

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/numpy/__init__.py in <module>() 134 return loader(packages, *options) 135 --> 136 import add_newdocs 137 __all__ = ['add_newdocs'] 138

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/numpy/add_newdocs.py in <module>() 7 # core/fromnumeric.py, core/defmatrix.py up-to-date. 8 ----> 9 from numpy.lib import add_newdoc 10 11 ###############################################################################

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/numpy/lib/__init__.py in <module>() 11 12 import scimath as emath ---> 13 from polynomial import * 14 #import convertcode 15 from utils import *

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/numpy/lib/polynomial.py in <module>() 15 from numpy.lib.function_base import trim_zeros, sort_complex 16 from numpy.lib.type_check import iscomplex, real, imag ---> 17 from numpy.linalg import eigvals, lstsq 18 19 class RankWarning(UserWarning):

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/numpy/linalg/__init__.py in <module>() 46 from info import __doc__ 47 ---> 48 from linalg import * 49 50 from numpy.testing import Tester

/opt/sage-5.0.1-linux-32bit-ubuntu_12.04_lts-i686-Linux/local/lib/python2.7/site-packages/numpy/linalg/linalg.py in <module>() 21 isfinite, size, finfo, absolute, log, exp 22 from numpy.lib import triu ---> 23 from numpy.linalg import lapack_lite 24 from numpy.matrixlib.defmatrix import matrix_power 25 from numpy.compat import asbytes

ImportError: libgfortran.so.3: cannot open shared object file: No such file or directory sage: plot(x,0,1)
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', (2097, 0))

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', (273, 0))

AttributeError Traceback (most recent call last)