value error in python script

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I can reproduce your error with:

In [230]: np.concatenate([],0)
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-230-2a097486ce12> in <module>()
----> 1 np.concatenate([],0)

ValueError: need at least one array to concatenate

In [231]: np.concatenate([np.atleast_2d(i) for i in ()],0)
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-231-007f2dd2af1b> in <module>()
----> 1 np.concatenate([np.atleast_2d(i) for i in ()],0)

ValueError: need at least one array to concatenate

So you need to figure out is why tup in the last call is empty. Or tracing back a step, why allInstanceGroupList, the argument to vstack is empty.

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