[pymvpa] errors when running sphere_gnbsearchlight+balancer

[Tren Huang]

Dear PyMVPA experts,

I successfully ran through the following code using Python 2.6.2+PyMVPA
2.2.0:

from mvpa2.tutorial_suite import *
ds=get_raw_haxby2001_data(roi='vt')
part=NFoldPartitioner()
sl=sphere_gnbsearchlight(GNB(),part,postproc=mean_sample())
map=sl(ds)

However, the same code with a new partitioner led to errors:

part=ChainNode([NFoldPartitioner(),
                Balancer(limit='partitions',apply_selection=True)],
                space='partitions')

The error messages were:

Traceback (most recent call last):
  File "debug.py", line 9, in <module>
    map=sl(ds)
  File "/usr/local/lib/python2.6/dist-packages/mvpa2/base/learner.py", line
239, in __call__
    return super(Learner, self).__call__(ds)
  File "/usr/local/lib/python2.6/dist-packages/mvpa2/base/node.py", line
96, in __call__
    result = self._call(ds)
  File
"/usr/local/lib/python2.6/dist-packages/mvpa2/measures/searchlight.py",
line 141, in _call
    results = self._sl_call(dataset, roi_ids, nproc)
  File
"/usr/local/lib/python2.6/dist-packages/mvpa2/measures/adhocsearchlightbase.py",
line 354, in _sl_call
    if not (np.all(p.sa[targets_sa_name].value == labels)):
ValueError: shape mismatch: objects cannot be broadcast to a single shape

Any ideas about what's wrong here?

Thanks!
Tren
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