Error when my events generation gets refined

Asked by Olivier Dupon on 2020-06-22

Dear experts,

I am currently studying Lepton Flavor Violation for the FCC consindering e- e+ --> t t~, where we consider the top quark to decay into a hypothetical W' particle.

When trying to generate events of any type I get the following error:

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* W E L C O M E to *
* M A D G R A P H 5 _ a M C @ N L O *
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* VERSION 2.7.0 2020-01-20 *
* *
* The MadGraph5_aMC@NLO Development Team - Find us at *
* https://server06.fynu.ucl.ac.be/projects/madgraph *
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* http://amcatnlo.web.cern.ch/amcatnlo/ *
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* Type 'help' for in-line help. *
* Type 'tutorial' to learn how MG5 works *
* Type 'tutorial aMCatNLO' to learn how aMC@NLO works *
* Type 'tutorial MadLoop' to learn how MadLoop works *
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load MG5 configuration from input/mg5_configuration.txt
Using golem library in /cvmfs/sft.cern.ch/lcg/views/LCG_92/x86_64-slc6-gcc62-dbg/lib
set fastjet to fastjet-config
set lhapdf to lhapdf-config
Using default text editor "vi". Set another one in ./input/mg5_configuration.txt
No valid web browser found. Please set in ./input/mg5_configuration.txt
set automatic_html_opening False --no_save
compute_widths 34 --precision_channel=0.01 --body_decay=4.0025 --path=/storage_mnt/storage/user/odupon/MG5_aMC_v2_7_0/PROC_WEff_UFO_4/Cards/param_card.dat --output=/storage_mnt/storage/user/odupon/MG5_aMC_v2_7_0/PROC_WEff_UFO_4/Cards/param_card.dat
Please note that the automatic computation of the width is
    only valid in narrow-width approximation and at tree-level.
INFO: Get two body decay from FeynRules formula
Results written to /storage_mnt/storage/user/odupon/MG5_aMC_v2_7_0/PROC_WEff_UFO_4/Cards/param_card.dat
INFO: get decay diagram for wp+
Vertexlist of this model has not been searched.Automatically run the model.find_vertexlist()
Found 3 stable particles
No decay is found
No need for N body-decay (N>2). Results are in /storage_mnt/storage/user/odupon/MG5_aMC_v2_7_0/PROC_WEff_UFO_4/Cards/param_card.dat
INFO: Update the dependent parameter of the param_card.dat
WARNING: Failed to update dependent parameter. This might create trouble for external program (like MadSpin/shower/...)
Generating 10000 events with run name run_01
survey run_01
INFO: compile directory
compile Source Directory
Using random number seed offset = 21
INFO: Running Survey
Creating Jobs
Working on SubProcesses
INFO: P1_emep_bbxepemvlvl
INFO: Idle: 26, Running: 8, Completed: 0 [ current time: 18h51 ]
INFO: Idle: 25, Running: 8, Completed: 1 [ 0.59s ]
INFO: Idle: 21, Running: 8, Completed: 5 [ 4.6s ]
INFO: Idle: 17, Running: 8, Completed: 9 [ 8.5s ]
INFO: Idle: 13, Running: 8, Completed: 13 [ 13s ]
INFO: Idle: 10, Running: 8, Completed: 16 [ 16.2s ]
INFO: Idle: 7, Running: 8, Completed: 19 [ 21.3s ]
INFO: Idle: 5, Running: 8, Completed: 21 [ 29.2s ]
INFO: Idle: 2, Running: 8, Completed: 24 [ 33.9s ]
INFO: Idle: 1, Running: 8, Completed: 25 [ 37.2s ]
INFO: Idle: 0, Running: 6, Completed: 28 [ 41.4s ]
INFO: Idle: 0, Running: 4, Completed: 30 [ 47.1s ]
INFO: Idle: 0, Running: 3, Completed: 31 [ 1m 4s ]
INFO: Idle: 0, Running: 1, Completed: 33 [ 1m 15s ]
INFO: Idle: 0, Running: 0, Completed: 34 [ 1m 24s ]
INFO: Idle: 0, Running: 0, Completed: 34 [ 1m 24s ]
INFO: End survey
refine 10000
Creating Jobs
INFO: Refine results to 10000
INFO: Generating 10000.0 unweighted events.
INFO: Effective Luminosity 2493105.64962 pb^-1
INFO: need to improve 3 channels
- Current estimate of cross-section: 0.00481327375831 +- 6.9755703137e-05
    P1_emep_bbxepemvlvl
INFO: Idle: 6, Running: 8, Completed: 0 [ current time: 18h52 ]
INFO: Idle: 5, Running: 8, Completed: 1 [ 0.88s ]
INFO: Idle: 0, Running: 2, Completed: 12 [ 5.6s ]
INFO: Idle: 0, Running: 0, Completed: 14 [ 22.7s ]
INFO: Idle: 0, Running: 0, Completed: 14 [ 22.8s ]
INFO: Combining runs
INFO: finish refine
Command "generate_events run_01" interrupted with error:
KeyError : 'second_refine_treshold'
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/storage_mnt/storage/user/odupon/MG5_aMC_v2_7_0/PROC_WEff_UFO_4/run_01_tag_1_debug.log'.
Please attach this file to your report.
INFO:
quit
INFO:
MG5_aMC>

I never got this error before and I haven't touched any of the internal MadGraph files. My MadGraph, however, did just get updated and the error never appeared before the update. Any advice is appreciated.

Kind regards
Olivier Dupon

Question information

Language:
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Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
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Last query:
2020-06-22
Last reply:
2020-06-22

Let's discuss this in the associated bug report

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