I'm using filetype = maus_virtual_hit (same result with 'maus_primary'), and get the following error:

~/maus2/Harp python Plot.py Sim_6mm_1MeVc_1000mu_1e-08nsec_IV_none__t_.root
done
First loading the data...
Traceback (most recent call last):
File "Plot.py", line 14, in <module>
bunch_list = Bunch.new_list_from_read_builtin(filetype, filename)
File "/home/carlisle/maus2/devel_2/third_party/install/lib/python2.7/site-packages/xboa/Bunch.py", line 205, in new_list_from_read_builtin
bunch_dict = Bunch.new_dict_from_read_builtin(file_type_string, file_name, sort_variable)
File "/home/carlisle/maus2/devel_2/third_party/install/lib/python2.7/site-packages/xboa/Bunch.py", line 177, in new_dict_from_read_builtin
elif file_type_string.find('maus') > -1: bunch = Bunch.read_maus_file(file_name, list_of_maus_types=[file_type_string])
File "/home/carlisle/maus2/devel_2/third_party/install/lib/python2.7/site-packages/xboa/Bunch.py", line 331, in read_maus_file
raise IOError("Failed to parse json spill "+str(spill_index)+" in file "+file_name+"\n"+line)
IOError: Failed to parse json spill 0 in file Sim_6mm_1MeVc_1000mu_1e-08nsec_IV_none__t_.root
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What am I doing wrong? I understand the XBOA should burrow down into the ROOT file to locate the VirtualHits...

Thanks,

Tim