[yt-users] merger tree error

[Molly Peeples]

Hi,

I'm getting an error when trying to run MergerTree:
amods.halo_merger_tree.MergerTree(restart_files=files,
database='/home/molly-ucla/halos.db')


It looks like it runs fine for the first two outputs and then stops:

yt         INFO       2010-12-16 09:59:59,440 Parameters:
current_redshift          = 85.4105867817
yt         INFO       2010-12-16 09:59:59,440 Parameters: omega_lambda
             = 0.721
yt         INFO       2010-12-16 09:59:59,440 Parameters: omega_matter
             = 0.279
yt         INFO       2010-12-16 09:59:59,440 Parameters:
hubble_constant           = 0.701
Traceback (most recent call last):
  File "merger.py", line 10, in <module>
    amods.halo_merger_tree.MergerTree(restart_files=files,
database='/home/molly-ucla/halos.db')
  File "/home/molly-ucla/yt-x86_64/lib/python2.6/site-packages/yt-2.0dev-py2.6-linux-x86_64.egg/yt/analysis_modules/halo_merger_tree/merger_tree.py",
line 186, in __init__
    self._run_halo_finder_add_to_db()
  File "/home/molly-ucla/yt-x86_64/lib/python2.6/site-packages/yt-2.0dev-py2.6-linux-x86_64.egg/yt/analysis_modules/halo_merger_tree/merger_tree.py",
line 220, in _run_halo_finder_add_to_db
    if self.period == -1:
ValueError: The truth value of an array with more than one element is
ambiguous. Use a.any() or a.all()
Nodes:        tcc-2-0


Ideas?
--Molly