I don't think you attached the shower log, but only the MG5aMC crash log,
which is not useful to check the behavior of Pythia8.
Ideally, I would like to look at the Pythia8 log at (when turning on
parallelization):

/afs/cern.ch/work/j/jruizalv/public/MC_tools/MG5_aMC_v2_5_
1/BBbar_13TeV/Events/run_01/split_<x>/[...]_pyth
<http://cern.ch/work/j/jruizalv/public/MC_tools/MG5_aMC_v2_5_1/BBbar_13TeV/Events/run_01/tag_1_pyth>
ia8.log

In any case, It's likely not a problem of PY8 since it appears only with
parallelization, so could you tell me exactly the process and the run
parameters (including number of events and cores) that you are considering
so that I can try to reproduce this issue?

On Tue, Dec 13, 2016 at 7:48 PM, José David Ruiz <email address hidden>
wrote:

> Answers between lines:
>
> >Could you check if the problem is also present when turning off PY8
> parallelization?
> >You can do so by setting the MG5aMC option 'nb_core' to 1.
>
> The issue disappears when turning off the parallelization.
>
> >Also, could you attach the xml file that contains the DJR histograms
> generated by Pythia8?
> >It should be in:
> >
> >/afs/cern.ch/work/j/jruizalv/public/MC_tools/MG5_aMC_v2_5_
> 1/BBbar_13TeV/Events/run_01/djrs.dat
> >
> >if it was not already erased when the error occurred.
> >
>
> It is not there, so I guess it was erased before the error occured.
>
> >Also, given how quickly Pythia8 ran, it seems unlikely that there was not
> a problem there.
> >Could you look at the log of the Shower runs and report if you seen any
> mention of a problem at >the end, i.e. in:
> >
> >/afs/cern.ch/work/j/jruizalv/public/MC_tools/MG5_aMC_v2_5_
> 1/BBbar_13TeV/Events/run_01/tag_1_pyth>ia8.log
> >
>
> I'm attaching the log.
>
> >(All the paths above are for a single run of Pythia8. The corresponding
> path for a parallel run >of Pythia8 will be in the split_<x>
> directories).
>
> I'm also attaching the directories.
>
> ** Attachment added: "PY8_parallelization.tar.gz"
>    https://bugs.launchpad.net/mg5amcnlo/+bug/1649725/+
> attachment/4791418/+files/PY8_parallelization.tar.gz
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1649725
>
> Title:
>   MadGraph5Error : Histogram with run_id '0' was not found in the
>   specified XML source.
>
> Status in MadGraph5_aMC@NLO:
>   New
>
> Bug description:
>   Dear MG authors,
>
>   I'm experiencing a problem when running pythia 8 in a server. The
>   error message is the following:
>
>   $ ./bin/madevent
>   launch in debug mode
>   ************************************************************
>   *                                                          *
>   *                      W E L C O M E to                    *
>   *             M A D G R A P H 5 _ a M C @ N L O            *
>   *                      M A D E V E N T                     *
>   *                                                          *
>   *                 *                       *                *
>   *                   *        * *        *                  *
>   *                     * * * * 5 * * * *                    *
>   *                   *        * *        *                  *
>   *                 *                       *                *
>   *                                                          *
>   *         VERSION 2.5.1                 20xx-xx-xx         *
>   *                                                          *
>   *    The MadGraph5_aMC@NLO Development Team - Find us at   *
>   *    https://server06.fynu.ucl.ac.be/projects/madgraph     *
>   *                                                          *
>   *               Type 'help' for in-line help.              *
>   *                                                          *
>   ************************************************************
>   INFO: load configuration from /afs/cern.ch/work/j/jruizalv/
> public/MC_tools/MG5_aMC_v2_5_1/BBbar_13TeV/Cards/me5_configuration.txt
>   INFO: load configuration from /afs/cern.ch/work/j/jruizalv/
> public/MC_tools/MG5_aMC_v2_5_1/input/mg5_configuration.txt
>   INFO: load configuration from /afs/cern.ch/work/j/jruizalv/
> public/MC_tools/MG5_aMC_v2_5_1/BBbar_13TeV/Cards/me5_configuration.txt
>   Using default eps viewer "evince". Set another one in
> ./input/mg5_configuration.txt
>   Using default web browser "firefox". Set another one in
> ./input/mg5_configuration.txt
>   BBbar_13TeV>pythia8 run_01
>   INFO: compile directory
>   compile Source Directory
>   Which programs do you want to run?
>       0 / auto    : running existing cards
>       1. pythia8  : Pythia8
>       3. delphes  : Pythia8 + Delphes.
>    [0, 1, 3, auto, pythia8, delphes][60s to answer]
>   >1
>   Will run in mode pythia8
>   Do you want to edit a card (press enter to bypass editing)?
>   /------------------------------------------------------------\
>   |  1. pythia8 : pythia8_card.dat                             |
>   \------------------------------------------------------------/
>    you can also
>      - enter the path to a valid card.
>    [0, done, 1, pythia8, enter path][90s to answer]
>   >0
>   INFO: Update the dependent parameter of the param_card.dat
>   INFO: Running Pythia8 [arXiv:1410.3012]
>   Splitting .lhe event file for PY8 parallelization...
>   Submitting Pythia8 jobs...
>   Pythia8 shower jobs: 1 Idle, 7 Running, 0 Done [1 seconds]
>   Pythia8 shower jobs: 0 Idle, 3 Running, 5 Done [3 seconds]
>   Pythia8 shower jobs: 0 Idle, 2 Running, 6 Done [3 seconds]
>   Pythia8 shower jobs: 0 Idle, 1 Running, 7 Done [3 seconds]
>   Pythia8 shower jobs: 0 Idle, 0 Running, 8 Done [3 seconds]
>   Merging results from the split PY8 runs...
>   Error detected in "pythia8 run_01 "
>   write debug file /afs/cern.ch/work/j/jruizalv/
> public/MC_tools/MG5_aMC_v2_5_1/BBbar_13TeV/run_01_tag_1_debug.log
>   If you need help with this issue please contact us on
> https://answers.launchpad.net/mg5amcnlo
>   MadGraph5Error : Histogram with run_id '0' was not found in the
> specified XML source.
>
>   I attach the log file and the config of the system where I'm running.
>   I'm also experiencing the same problem in lxplus.
>
>   Thanks,
>   Jose
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mg5amcnlo/+bug/1649725/+subscriptions
>



-- 
Valentin