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2011-11-22 15:09:49 -0600 asked a question trying to install dot2tex

In trying to view a crystal graph, I had this sequence of exchanges with SAGE

sage: B=CrystalOfTableaux(['A',2],shape=[2,1])
sage: view(B)
evaluate

dot2tex not available.  Install after running 'sage -sh'
dot2tex not available.  Install after running 'sage -sh'
None

sage: -sh
evaluate


Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "_sage_input_14.py", line 10, in <module>
    exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 -*-\\n" + _support_.preparse_worksheet_cell(base64.b64decode("LXNo"),globals())+"\\n"); execfile(os.path.abspath("___code___.py"))
  File "", line 1, in <module>

  File "/tmp/tmp_8N1J9/___code___.py", line 2, in <module>
    exec compile(u'-sh
  File "", line 1, in <module>

AttributeError: Sh instance has no attribute '__neg__'

What did I do wrong trying to run the -sh command? And after I get it to run, do I just enter -i dot2tex?