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ConstantLengthFragSet(3)..read_fragment_file RuntimeError

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ConstantLengthFragSet(3)..read_fragment_file RuntimeError

Hello ~
I'm interested in Pyrosetta
and learning the tutorial
Workshop #4: PyRosetta Folding
page 4
11. Create a new subroutine in your folding code for an alternate random move based upon a “fragment insertion”. A fragment insertion is the replacement of the torsion angles for a set of consecutive residues with new torsion angles pulled at random from a fragment library file. Prior to calling the subroutine, load the set of fragments from the fragment file:
fragset = ConstantLengthFragSet(3)

so I did the same work and it said just error
In [3] : fragset = ConstantLengthFragSet(3)

In [4] :fragset.read_fragment_file("test/data/workshops/aat000_03_05.200_v1_3")
Open failed for file :
←[0m←[1m←[31mERROR: : Exit from:core/fragment/ line: 117
←[0m -----------------------------------------------------------------------------------------------------------------------
RuntimeError Traceback(most recent call last)
<ipython-imput-4-1432af1f1a60> in <module>()
-----> fragset.read_fragment_file("test/data/workshops/aat000_03_05.200_v1_3")
RuntimeError: unidenifiable C++ exception

In [5] :
file "test/data/workshops/aat000_03_05.200_v1_3" exsist.
then what the problem??!?
Why I can load the fragment file?

please tell me what's the wrong.

Post Situation: 
Mon, 2014-09-29 07:53
Mon, 2014-09-29 15:14