Problem coming when I running madgraph from pythia8

Bug #1804144 reported by jaswantsingh on 2018-11-20
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
MadGraph5_aMC@NLO
Undecided
Unassigned

Bug Description

Hello everyone, please can anyone tell me how to solve this problem

Now generating 10000 events with random seed 1 and granularity 1
Traceback (most recent call last):
  File "./madevent/bin/gridrun", line 87, in <module>
    cmd_line = cmd_interface.GridPackCmd(me_dir=root_path, nb_event=args[0], seed=args[1], gran=args[2])
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/madevent_interface.py", line 6309, in __init__
    MadEventCmd.__init__(self, me_dir, *completekey, **stdin)
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/madevent_interface.py", line 2108, in __init__
    CmdExtended.__init__(self, me_dir, options, *completekey, **stdin)
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/madevent_interface.py", line 203, in __init__
    super(CmdExtended, self).__init__(me_dir, options, *arg, **opt)
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/common_run_interface.py", line 666, in __init__
    self.set_configuration()
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/madevent_interface.py", line 2148, in set_configuration
    final=final, **opt)
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/common_run_interface.py", line 3516, in set_configuration
    self.set_configuration(config_path=me5_config, final=False, initdir=self.me_dir)
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/madevent_interface.py", line 2148, in set_configuration
    final=final, **opt)
  File "/home/jaswant/MG5_aMC_v2_6_3_2/HEPTools/pythia8/share/Pythia8/examples/madgraphrun/madevent/bin/internal/common_run_interface.py", line 3526, in set_configuration
    config_file = open(config_path)
IOError: [Errno 2] No such file or directory: '/home/jaswant/root/Cards/me5_configuration.txt'
mv: cannot stat './Events/GridRun_1/unweighted_events.lhe.gz': No such file or directory
write ./events.lhe.gz
 PYTHIA Abort from Pythia::init: Les Houches initialization failed
 PYTHIA Abort from Pythia::next: not properly initialized so cannot generate events
*------- PYTHIA Event and Cross Section Statistics -------------------------------------------------------------*
 | |
 | Subprocess Code | Number of events | sigma +- delta |
 | | Tried Selected Accepted | (estimated) (mb) |
 | | | |
 |-----------------------------------------------------------------------------------------------------------------|
 | | | |
 | | | |
 | sum | 0 0 0 | 0.000e+00 0.000e+00 |
 | |
 *------- End PYTHIA Event and Cross Section Statistics ----------------------------------------------------------*

 *------- PYTHIA Error and Warning Messages Statistics ----------------------------------------------------------*
 | |
 | times message |
 | |
 | 1 Abort from Pythia::init: Les Houches initialization failed |
 | 10 Abort from Pythia::next: not properly initialized so cannot generate events |
 | |
 *------- End PYTHIA Error and Warning Messages Statistics -----------------------

Hi,

We would be able to try to help you.
But the first thing that we need to know is what you try to do.
Now I would be that the problem is within the code of pythia8 that handles that case and not in our code but this is just a wild guess corresponding to a similar bug report who turns out related to Py8 remove the directory too fast. (and your error seems related to a missing directory).

My advise would therefore be
1) give us more details on what you do with MG5aMC
2) probably contact PY8 author
3) try to use MG5aMC in standalone (and not via Pythia8)

Cheers,

Olivier

Changed in mg5amcnlo:
status: New → Invalid
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