HDF5ExtError                              Traceback (most recent call last)
<ipython-input-14-1b6ee0ce3e6a> in <module>()
      8     m.use_step_method(AdaptiveMetropolis, m.beta)
      9     # run with given priors
---> 10     m.sample(niter, burn=burn, thin=thin)
     11
     12     # run second chain starting from MAP estimates

/home/skipper/.local/lib/python2.7/site-packages/pymc/MCMC.pyc in sample(self, iter, burn, thin, tune_interval, tune_throughout, save_interval, burn_till_tuned, stop_tuning_after, verbose, progress_bar)
    275
    276         # Run sampler
--> 277         Sampler.sample(self, iter, length, verbose)
    278
    279     def _loop(self):

/home/skipper/.local/lib/python2.7/site-packages/pymc/Model.pyc in sample(self, iter, length, verbose)
    241         if length is None:
    242             length = iter
--> 243         self.db._initialize(self._funs_to_tally, length)
    244
    245         # Put traces on objects

/home/skipper/.local/lib/python2.7/site-packages/pymc/database/hdf5.pyc in _initialize(self, funs_to_tally, length)
    450         for object in self.model.observed_stochastics:
    451             if object.keep_trace is True:
--> 452                 setattr(table.attrs, object.__name__, object.value)
    453
    454        # Make sure the variables have a corresponding Trace instance.

/usr/local/lib/python2.7/dist-packages/tables/attributeset.pyc in __setattr__(self, name, value)
    450
    451         # Set the attribute.
--> 452         self._g__setattr(name, value)
    453
    454         # Log new attribute addition.

/usr/local/lib/python2.7/dist-packages/tables/attributeset.pyc in _g__setattr(self, name, value)
    393             value = stvalue[()]
    394
--> 395         self._g_setattr(self._v_node, name, stvalue)
    396
    397         # New attribute or value. Introduce it into the local

/usr/local/lib/python2.7/dist-packages/tables/hdf5extension.so in tables.hdf5extension.AttributeSet._g_setattr (tables/hdf5extension.c:6470)()

HDF5ExtError: HDF5 error back trace

  File "../../../src/H5A.c", line 927, in H5Awrite
    not an attribute

End of HDF5 error back trace

Can't set attribute 'dn_like' in node:
 /chain0/PyMCsamples (Table(0,)) 'PyMC samples'.