Comment 4 for bug 1674341

The specification 'nb_core=1' actually worked and turned off
parallelization. As you can see, you no longer have any 'split' directory
(which results from the parallelization obtained by splitting the original
.lhe event file) and the PY8 log file was this time found in:

/data/atlas/dbetalhc/nico-test/zjj_matched_MG253/Events/
run_02/tag_2_pythia8.log

From the 'run_02' directory, could you send me the
'unweighted_events.lhe.gz' file (ideally upload it somewhere and give me a
link to it) as well as the file 'tag_2_pythia8.cmd' so that i can try to
reproduce the issue?

On Tue, Mar 21, 2017 at 7:00 PM, Nicolas A. Neill <
<email address hidden>> wrote:

> Hi Valentin,
>
> After reshowering with
>
> ./bin/mg5
> launch ~/mgoutput2/zjj_matched_MG253 -i
> set nb_core 1
> shower pythia8 run_01 -f
>
> I get the following:
>
> zjj_matched_MG253>set nb_core 1
> INFO: This option will be the default in any output that you are going to
> create in this session.
> INFO: In order to keep this changes permanent please run 'save options'
> zjj_matched_MG253>shower pythia8 run_01 -f
> INFO: compile directory
> compile Source Directory
> Will run in mode delphes
> INFO: Running Pythia8 [arXiv:1410.3012]
> No user-defined value for Pythia8 parameter 'JetMatching:nJetMax'. Setting
> it automatically to 2.
> Follow Pythia8 shower by running the following command (in a separate
> terminal):
> tail -f /data/atlas/dbetalhc/nico-test/zjj_matched_MG253/Events/
> run_01/tag_2_pythia8.log
> INFO: Create matching plots for Pythia8
> Pythia8 cross-section could not be retreived.
> Try turning parallelization off by setting the option nb_core to 1.
> Pythia8 merged cross-sections could not be retreived.
> Try turning parallelization off by setting the option nb_core to 1.
> INFO: Pythia8 shower finished after 2 seconds.
> INFO: prepare delphes run
> INFO: Running Delphes
> Command "shower pythia8 run_01 -f" interrupted with error:
> AttributeError : 'NoneType' object has no attribute 'launch_and_wait'
> Please report this bug on https://bugs.launchpad.net/mg5amcnlo
> More information is found in '/data/atlas/dbetalhc/nico-
> test/zjj_matched_MG253/run_01_tag_2_debug.log'.
> Please attach this file to your report.
> INFO: storing files of previous run
> INFO: Storing Pythia8 files of previous run
> INFO: Done
>
> It looks like it doesn't recognize the instruction with the number of
> cores. I also tried a new run with:
>
> zjj_matched_MG253>generate_events --nb_core=1
>
> but I get almost the same:
>
> [...]
> INFO: End of systematics computation
> store_events
> INFO: Storing parton level results
> INFO: End Parton
> reweight -from_cards
> decay_events -from_cards
> INFO: Running Pythia8 [arXiv:1410.3012]
> No user-defined value for Pythia8 parameter 'JetMatching:nJetMax'. Setting
> it automatically to 2.
> Follow Pythia8 shower by running the following command (in a separate
> terminal):
> tail -f /data/atlas/dbetalhc/nico-test/zjj_matched_MG253/Events/
> run_02/tag_2_pythia8.log
> INFO: Create matching plots for Pythia8
> Pythia8 cross-section could not be retreived.
> Try turning parallelization off by setting the option nb_core to 1.
> Pythia8 merged cross-sections could not be retreived.
> Try turning parallelization off by setting the option nb_core to 1.
> INFO: Pythia8 shower finished after 2 seconds.
> INFO: prepare delphes run
> INFO: Running Delphes
> Command "generate_events --nb_core=1" interrupted with error:
> AttributeError : 'NoneType' object has no attribute 'launch_and_wait'
> Please report this bug on https://bugs.launchpad.net/mg5amcnlo
> More information is found in '/data/atlas/dbetalhc/nico-
> test/zjj_matched_MG253/run_02_tag_2_debug.log'.
> Please attach this file to your report.
>
> I'm attaching the debug and pythia8 log files for the last run (the
> errors in the logs from the previous run are the same).
>
> Cheers,
> Nicolas.
>
> ** Attachment added: "Debug and Pythia8 logs"
> https://bugs.launchpad.net/mg5amcnlo/+bug/1674341/+
> attachment/4841850/+files/run_02_tag_2_debug_and_pythia8.log
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1674341
>
> Title:
> Pythia8 shower failed since it did not accept any event from the
> MG5aMC event file
>
> Status in MadGraph5_aMC@NLO:
> New
>
> Bug description:
> Hi,
>
> I'm trying to generate a matched jet sample using pythia8 and MG
> 2.5.3, but I'm getting the following error:
>
> Command "generate_events run_01" interrupted with error:
> InvalidCmd : Pythia8 shower failed since it did not accept any event
> from the MG5aMC event file.
>
> I'm doing the following for the generation:
>
> generate p p > z, z > e+ e- @0
> add process p p > z j, z > e+ e- @1
> add process p p > z j j, z > e+ e- @2
> output ~/mgoutput2/zjj_matched_MG253
> launch
> shower=pythia8
> detector=delphes
> set run_card ickkw 1
> set run_card auto_ptj_mjj True
> set run_card xqcut 20
> set pythia8_card JetMatching:qCut 30
>
> The same process with MG 2.3.3 and pythia 6 works fine.
>
> I'm attaching the end of one of the log files
> (Events/run_01/PY8_parallelization/split_0/PY8_log.txt). If I don't do
> matching, the showering with pythia8 is working fine.
>
> Thanks in advance,
>
>
> Nicolas.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mg5amcnlo/+bug/1674341/+subscriptions
>

--
Valentin