Worflows failing on provenance collection

[parnesh...@gmail.com]

I am run workflows and on some machines I repeatedly get the following error.

        Traceback (most recent call last):
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/pipeline/plugins/linear.py", line 38, in run
    node.run(updatehash=updatehash)
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/pipeline/engine.py", line 1386, in run
    self._run_interface()
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/pipeline/engine.py", line 1496, in _run_interface
    self._result = self._run_command(execute)
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/pipeline/engine.py", line 1622, in _run_command
    result = self._interface.run()
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/interfaces/base.py", line 957, in run
    prov_record = write_provenance(results)
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/utils/provenance.py", line 229, in write_provenance
    ps.add_results(results)
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/utils/provenance.py", line 330, in add_results
    out_entity = prov_encode(self.g, val).get_identifier()
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/utils/provenance.py", line 191, in prov_encode
    item_entity = prov_encode(graph, item)
  File "/usr/local/python/2.7.3-gcc/lib/python2.7/site-packages/nipype/utils/provenance.py", line 207, in prov_encode
    entity = prov_encode(graph, value[0])
IndexError: list index out of range


If I turn off provenance generation, the workflow runs without error. I am using nipype v0.92.

[Satrajit Ghosh]

hi parnesh,

this was fixed in master. we did not release a patch for this in the releases yet.

cheers,

satra

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[parnesh...@gmail.com]

Thanks. I will generate a patch. Is the only file impacted provenance.py?

[Satrajit Ghosh]

yes. a diff with the current version should show the changes.

cheers,

satra