MadGraph5_aMC@NLO

Creating Pythia LHE Root File creats issues

Asked by SUBHASISH BEHERA

Hi MadGraph team,

I am using :
MG5_aMC_v2_6_1

I am trying to generate :
import model loop_sm
generate p p > t t~ h [all=QCD]

Then while running I got the following problem :

INFO: Events generated
reweight -from_cards
decay_events -from_cards
INFO: Preparing MCatNLO run
INFO: Using LHAPDF v6.2.0 interface for PDFs
INFO: Compiling MCatNLO for HERWIG6...
INFO: ... done
INFO: Showering events...
INFO: (Running in /home/subhasish153.local/RESEARCH/EVENT_GENERATORS/MADGRAPH5/MG5_aMC_v2_6_1/pp2tth_all_qcd_4flav/MCatNLO/RUN_HERWIG6_2)
INFO: Idle: 1, Running: 0, Completed: 0 [ current time: 20h55 ]
INFO: Idle: 0, Running: 1, Completed: 0 [ 5m 0s ]
INFO: Idle: 0, Running: 0, Completed: 1 [ 6m 2s ]
INFO: Idle: 0, Running: 0, Completed: 0 [ current time: 21h01 ]
INFO: plot for run run_02
INFO: Creating shower LHE File (for plot)
INFO: Warning! Never use this lhe file for detector studies!
INFO: Creating Pythia LHE Root File
Warning in <TFile::Init>: no StreamerInfo found in /home/subhasish153.local/RESEARCH/EVENT_GENERATORS/MADGRAPH5/MG5_aMC_v2_6_1/ExRootAnalysis/ExRootAnalysisDict_rdict.pcm therefore preventing schema evolution when reading this file.
Warning in <TTree::Bronch>: Using split mode on a class: TRootWeight with a custom Streamer
** Reading pythia_events.lhe
** [----------------------------------------------------------------] (0.00%)
 *** Break *** segmentation violation

Thanks,
Subhasish

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Solved by:
Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

hi,

I would suggest to remove the MadAnalysis(4) package since this is the one responsible for such crash.
That package is not maintain anymore so we will not fix this issue.

Cheers,

Olivier

> On 7 Apr 2018, at 13:02, SUBHASISH BEHERA <email address hidden> wrote:
>
> New question #667643 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/667643
>
> Hi MadGraph team,
>
> I am using :
> MG5_aMC_v2_6_1
>
> I am trying to generate :
> import model loop_sm
> generate p p > t t~ h [all=QCD]
>
>
> Then while running I got the following problem :
>
> INFO: Events generated
> reweight -from_cards
> decay_events -from_cards
> INFO: Preparing MCatNLO run
> INFO: Using LHAPDF v6.2.0 interface for PDFs
> INFO: Compiling MCatNLO for HERWIG6...
> INFO: ... done
> INFO: Showering events...
> INFO: (Running in /home/subhasish153.local/RESEARCH/EVENT_GENERATORS/MADGRAPH5/MG5_aMC_v2_6_1/pp2tth_all_qcd_4flav/MCatNLO/RUN_HERWIG6_2)
> INFO: Idle: 1, Running: 0, Completed: 0 [ current time: 20h55 ]
> INFO: Idle: 0, Running: 1, Completed: 0 [ 5m 0s ]
> INFO: Idle: 0, Running: 0, Completed: 1 [ 6m 2s ]
> INFO: Idle: 0, Running: 0, Completed: 0 [ current time: 21h01 ]
> INFO: plot for run run_02
> INFO: Creating shower LHE File (for plot)
> INFO: Warning! Never use this lhe file for detector studies!
> INFO: Creating Pythia LHE Root File
> Warning in <TFile::Init>: no StreamerInfo found in /home/subhasish153.local/RESEARCH/EVENT_GENERATORS/MADGRAPH5/MG5_aMC_v2_6_1/ExRootAnalysis/ExRootAnalysisDict_rdict.pcm therefore preventing schema evolution when reading this file.
> Warning in <TTree::Bronch>: Using split mode on a class: TRootWeight with a custom Streamer
> ** Reading pythia_events.lhe
> ** [----------------------------------------------------------------] (0.00%)
> *** Break *** segmentation violation
>
>
> Thanks,
> Subhasish
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
SUBHASISH BEHERA (subhparasara) said : 		#2

Thanks Olivier Mattelaer, that solved my question.

Revision history for this message
Saumyen Kundu (saumyen.k) said : 		#3

Hi Olivier,

This is because I am also getting same warning, i.e.,
-------------------------

Warning in <TTree::Bronch>: Using split mode on a class: TRootWeight with a custom Streamer
** Reading /home/pdas/HEP_Packages/MG5_aMC_v2_6_3_2/Dark_Matter_Searches/AfterSkype5/Contour/BG/Events/run_01/unweighted_events.lhe
** [################################################################] (100.00%)
** Exiting...

---------------------------
I was generating the root file with the command

$ ./ExRootLHEFConverter something.lhe something.root

A .root file has been generated, but I don't what's the effect of this warning. I mean what kind of problem I may face due to that problem that occured.
Can you give me some idea?

Thanks and regards,
Saumyen

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said : 		#4

Hi,

Sorry but this is outside my area of expertise.
ExRootAnalysis is a tool not developed by us. I would suggest that you contact the author of that tool (not even sure if that code is still supported actually)

Cheers,

Olivier