[yt-users] Problems finding halos

[Miguel Angel González]

Hi YT user,

I'm new using YT, and I'm already having problems when I've tried
to use the HOP, when I write the commands in Python, this comes out:
>>> from yt.mods import *
>>> from yt.analysis_modules.halo_finding.api import *
>>> pf = load("data0004")
>>> halo_list = HaloFinder(pf)
yt         INFO       2011-07-21 19:38:42,838 Getting the binary hierarchy
yt         INFO       2011-07-21 19:38:42,846 Finished with binary hierarchy
reading
yt         INFO       2011-07-21 19:38:42,849 Adding Phi to list of fields
Warning: invalid value encountered in sqrt
Warning: invalid value encountered in sqrt
yt         WARNING    2011-07-21 19:38:43,009 No particle_type, no
creation_time, so not distinguishing.
yt         INFO       2011-07-21 19:38:43,013 Getting ParticleMassMsun using
ParticleIO
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File
"/usr/local/yt-unknown/src/yt-hg/yt/analysis_modules/halo_finding/halo_objects.py",
line 1821, in __init__

 self._mpi_allsum((self._data_source["ParticleMassMsun"][select]).sum(dtype='float64'))
 File "/usr/local/yt-unknown/src/yt-hg/yt/data_objects/data_containers.py",
line 279, in __getitem__
   self.get_data(key)
 File "/usr/local/yt-unknown/src/yt-hg/yt/data_objects/data_containers.py",
line 1918, in get_data
   self.particles.get_data(field)
 File "/usr/local/yt-unknown/src/yt-hg/yt/data_objects/particle_io.py", line
92, in get_data
   conv_factors)
 File "/usr/local/yt-unknown/src/yt-hg/yt/frontends/enzo/io.py", line 154,
in _read_particles
   filenames, ids, conv_factors = zip(*sorted(zip(filenames, ids,
conv_factors)))
ValueError: need more than 0 values to unpack

Does anyone know how to fix this trouble?

Thanks in advance, Miguel Gonzalez.
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