Trouble running Sage in terminal

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Hi all,

So I start up Sage using the command:

'/Applications/Sage-6.2.app/Contents/Resources/sage'/sage

I'm trying to load this file:

#mod.sage
precision = 30

m = ModularForms(Gamma0(12),10,prec = precision)

p = m.basis()

Unfortunately I get a very large error when I run the following command: attach("mod.sage") However when I comment out the line p = m.basis(), the error goes away. I'm attaching the text from the error message below. Any ideas on how to fix this would be greatly appreciated. Sorry for the sloppy formatting!

---------------------------------------------------------------------------
IOError                                   Traceback (most recent call last)
<ipython-input-2-909b5a17cf48> in <module>()
----> 1 sage.misc.preparser.load(sage.misc.preparser.base64.b64decode("bW9kLnNhZ2U="),globals(),True)

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/misc/preparser.pyc in load(filename, globals, attach)
   1753         else:
   1754             raise IOError('did not find file %r in load / attach search path' \
-> 1755                 % filename)
   1756 
   1757     if fpath.endswith('.py'):

IOError: did not find file 'mod.sage' in load / attach search path
sage: cd /Users/brandonrayhaun/Desktop/Code/Sage
/Users/brandonrayhaun/Desktop/Code/Sage
sage: attach("mod.sage")
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-4-909b5a17cf48> in <module>()
----> 1 sage.misc.preparser.load(sage.misc.preparser.base64.b64decode("bW9kLnNhZ2U="),globals(),True)

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/misc/preparser.pyc in load(filename, globals, attach)
   1767             # See Trac 11812.
   1768             exec_file_is(fpath)
-> 1769             execfile(preparse_file_named(fpath), globals)
   1770         else:
   1771             # Preparse in memory only for speed.

/Users/brandonrayhaun/.sage/temp/anlwl151-059.wl.anl.gov/13637/mod.sageZRRz8A.py in <module>()
      6 precision = _sage_const_30
      7 
----> 8 m = ModularForms(Gamma0(_sage_const_12 ),_sage_const_10 ,prec = precision)
      9 # p = m.basis()

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/modular/modform/constructor.pyc in ModularForms(group, weight, base_ring, use_cache, prec)
    317     M = None
    318     if arithgroup.is_Gamma0(group):
--> 319         M = ambient_g0.ModularFormsAmbient_g0_Q(group.level(), weight)
    320         if base_ring != rings.QQ:
    321             M = ambient_R.ModularFormsAmbient_R(M, base_ring)

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/modular/modform/ambient_g0.pyc in __init__(self, level, weight)
     41             <class 'sage.modular.modform.ambient_g0.ModularFormsAmbient_g0_Q_with_category'>
     42         """
---> 43         ambient.ModularFormsAmbient.__init__(self, arithgroup.Gamma0(level), weight, rings.QQ)
     44 
     45     ####################################################################

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/modular/modform/ambient.pyc in __init__(self, group, weight, base_ring, character)
    110 
    111         if character is None and arithgroup.is_Gamma0(group):
--> 112             character = dirichlet.TrivialCharacter(group.level(), base_ring)
    113 
    114         space.ModularFormsSpace.__init__(self, group, weight, character, base_ring)

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/modular/dirichlet.pyc in trivial_character(N, base_ring)
    100         Ring of integers modulo 3
    101     """
--> 102     return DirichletGroup(N, base_ring)(1)
    103 
    104 TrivialCharacter = trivial_character

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/structure/factory.so in sage.structure.factory.UniqueFactory.__call__ (sage/structure/factory.c:1308)()

/Applications/Sage-6.2.app/Contents/Resources/sage/local/lib ...