I tried running pegasus-statistics, but I got errors on every directory. Here's an example:

[cybershk@shock pegasus-statistics]$ pegasus-statistics -s all -o /home/scec-02/cybershk/utils/Study_15_4/pegasus-statistics/3861 /home/scec-02/cybershk/runs/WNGC_PP_dax/run_3861/dags/cybershk/pegasus/CyberShake_WNGC/20150317T123530-0700
Deleting existing directory. Deleting... /home/scec-02/cybershk/utils/Study_15_4/pegasus-statistics/3861
2015-05-22 17:14:04,367:Pegasus.tools.utils:197: WARNING: Deleting existing directory. Deleting... /home/scec-02/cybershk/utils/Study_15_4/pegasus-statistics/3861
No results found for wf_uuid: 6ee73655-a760-4290-ae57-ae720042767b
2015-05-22 17:14:04,566:Pegasus.db.workflow.stampede_statistics.StampedeStatistics:211: ERROR: No results found for wf_uuid: 6ee73655-a760-4290-ae57-ae720042767b
No results found for wf_uuid: 6ee73655-a760-4290-ae57-ae720042767b
2015-05-22 17:14:04,785:Pegasus.db.workflow.stampede_statistics.StampedeStatistics:211: ERROR: No results found for wf_uuid: 6ee73655-a760-4290-ae57-ae720042767b
/opt/pegasus/pegasus-4.5.0rc1/lib64/pegasus/externals/python/sqlalchemy/sql/expression.py:1980: SAWarning: The IN-predicate on "workflow.wf_id" was invoked with an empty sequence. This results in a contradiction, which nonetheless can be expensive to evaluate. Consider alternative strategies for improved performance.
return o[0](self, self.expr, op, *(other + o[1:]), **kwargs)
Traceback (most recent call last):
File "/opt/pegasus/default/bin/pegasus-statistics", line 1215, in <module>
main()
File "/opt/pegasus/default/bin/pegasus-statistics", line 1212, in main
print_workflow_details(output_db_url, wf_uuid, output_dir, multiple_wf=multiple_wf)
File "/opt/pegasus/default/bin/pegasus-statistics", line 424, in print_workflow_details
wf_det = individual_workflow_stats.get_workflow_details()[0]
IndexError: list index out of range