Pythia 8 stucks on shower jobs

Asked by Maksym Ovchynnikov on 2019-04-21

Hi!

I am trying to simulate the processes

generate process p p > h [noborn=QCD]
add process p p > h j [noborn = QCD]

and then to interface it to pythia for showering and hadronization. pythia6 runs fine, while pythia8 stucks on shower job (as far as I can wait).

The parameters regarding matching/merging in the run_card.dat are

 1 = ickkw ! 0 no matching, 1 MLM
  1.0 = alpsfact ! scale factor for QCD emission vx
  False = chcluster ! cluster only according to channel diag
  4 = asrwgtflavor ! highest quark flavor for a_s reweight
  False = auto_ptj_mjj ! Automatic setting of ptj and mjj if xqcut >0
                                   ! (turn off for VBF and single top processes)
  30.0 = xqcut ! minimum kt jet measure between partons

I also tried to set the parameters in pythia8_card.dat manually:
qcut=45
Merging:nJetMax = 2.

The terminal output when launching is the following:
____________________________________________________________________________________________________________________
************************************************************
* *
* W E L C O M E to *
* M A D G R A P H 5 _ a M C @ N L O *
* *
* *
* * * *
* * * * * *
* * * * * 5 * * * * *
* * * * * *
* * * *
* *
* VERSION 2.6.5 2018-02-03 *
* *
* The MadGraph5_aMC@NLO Development Team - Find us at *
* https://server06.fynu.ucl.ac.be/projects/madgraph *
* and *
* http://amcatnlo.web.cern.ch/amcatnlo/ *
* *
* 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 *
* *
************************************************************
load MG5 configuration from ../input/mg5_configuration.txt
fastjet-config does not seem to correspond to a valid fastjet-config executable (v3+). We will use fjcore instead.
 Please set the 'fastjet'variable to the full (absolute) /PATH/TO/fastjet-config (including fastjet-config).
 MG5_aMC> set fastjet /PATH/TO/fastjet-config

lhapdf-config does not seem to correspond to a valid lhapdf-config executable.
Please set the 'lhapdf' variable to the (absolute) /PATH/TO/lhapdf-config (including lhapdf-config).
Note that you can still compile and run aMC@NLO with the built-in PDFs
 MG5_aMC> set lhapdf /PATH/TO/lhapdf-config

set ninja to /home/movchynnikov/Dropbox/MG5/HEPTools/lib
Using default text editor "vi". Set another one in ./input/mg5_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
Loading default model: sm
INFO: Restrict model sm with file ../models/sm/restrict_default.dat .
INFO: Run "set stdout_level DEBUG" before import for more information.
INFO: Change particles name to pass to MG5 convention
Defined multiparticle p = g u c d s u~ c~ d~ s~
Defined multiparticle j = g u c d s u~ c~ d~ s~
Defined multiparticle l+ = e+ mu+
Defined multiparticle l- = e- mu-
Defined multiparticle vl = ve vm vt
Defined multiparticle vl~ = ve~ vm~ vt~
Defined multiparticle all = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ z w+ h w- ta- ta+
MG5_aMC>launch higgs-spectrum
************************************************************
* *
* 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 2.6.5 2018-02-03 *
* *
* 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 /home/movchynnikov/Dropbox/MG5/bin/higgs-spectrum/Cards/me5_configuration.txt
INFO: load configuration from /home/movchynnikov/Dropbox/MG5/input/mg5_configuration.txt
INFO: load configuration from /home/movchynnikov/Dropbox/MG5/bin/higgs-spectrum/Cards/me5_configuration.txt
Using default text editor "vi". Set another one in ./input/mg5_configuration.txt
No valid Delphes path found
generate_events run_02
The following switches determine which programs are run:
/===========================================================================\
| 1. Choose the shower/hadronization program shower = Pythia8 |
| 2. Choose the detector simulation program detector = OFF |
| 3. Choose an analysis package (plot/convert) analysis = ExRoot |
| 4. Decay onshell particles madspin = OFF |
| 5. Add weights to events for new hypp. reweight = Not Avail. |
\===========================================================================/
Either type the switch number (1 to 5) to change its setting,
Set any switch explicitly (e.g. type 'shower=Pythia6' at the prompt)
Type 'help' for the list of all valid option
Type '0', 'auto', 'done' or just press enter when you are done.[60s to answer]
>0
Do you want to edit a card (press enter to bypass editing)?
/------------------------------------------------------------\
| 1. param : param_card.dat |
| 2. run : run_card.dat |
| 3. pythia8 : pythia8_card.dat |
| 4. MadLoopParams : MadLoopParams.dat |
\------------------------------------------------------------/
 you can also
   - enter the path to a valid card or banner.
   - use the 'set' command to modify a parameter directly.
     The set option works only for param_card and run_card.
     Type 'help set' for more information on this command.
   - call an external program (ASperGE/MadWidth/...).
     Type 'help' for the list of available command
 [0, done, 1, param, 2, run, 3, pythia8, 4, enter path, ... ][90s to answer]
>0
INFO: Update the dependent parameter of the param_card.dat
Generating 10000 events with run name run_02
survey run_02
INFO: compile directory
compile Source Directory
Using random number seed offset = 48
INFO: Running Survey
Creating Jobs
Working on SubProcesses
INFO: P0_gg_hg
INFO: P0_gg_h
INFO: P0_gq_hq
INFO: P0_qq_hg
INFO: Idle: 10, Running: 2, Completed: 0 [ current time: 23h36 ]
INFO: Idle: 9, Running: 2, Completed: 1 [ 10.5s ]
INFO: Idle: 9, Running: 2, Completed: 2 [ 17.5s ]
INFO: Idle: 8, Running: 2, Completed: 3 [ 32.1s ]
INFO: Idle: 8, Running: 2, Completed: 4 [ 35.3s ]
INFO: Idle: 7, Running: 2, Completed: 5 [ 50.1s ]
INFO: Idle: 6, Running: 2, Completed: 7 [ 53.5s ]
INFO: Idle: 5, Running: 2, Completed: 10 [ 58s ]
INFO: P0_gg_hg/G1 is at 0.0775 +- 0.00543 pb. Now submitting iteration #2.
INFO: P0_gg_hg/G2 is at 4.39 +- 0.141 pb. Now submitting iteration #2.
INFO: P0_gg_hg/G3 is at 4.12 +- 0.129 pb. Now submitting iteration #2.
INFO: P0_gg_h/G1 is at 15.8 +- 0.269 pb. Now submitting iteration #2.
INFO: P0_gq_hq/G1 is at 2.69 +- 0.0884 pb. Now submitting iteration #2.
INFO: Idle: 8, Running: 2, Completed: 18 [ 1m 34s ]
INFO: Idle: 7, Running: 2, Completed: 20 [ 1m 57s ]
INFO: Idle: 6, Running: 2, Completed: 22 [ 2m 28s ]
INFO: Idle: 5, Running: 2, Completed: 24 [ 2m 33s ]
INFO: Idle: 4, Running: 2, Completed: 26 [ 2m 41s ]
INFO: P0_qq_hg/G1 is at 0.0316 +- 0.00519 pb. Now submitting iteration #2.
INFO: P0_gg_hg/G1 is at 0.077635 +- 6.18e-05 pb. Now submitting iteration #3.
INFO: P0_gg_hg/G2 is at 4.403 +- 0.0139 pb. Now submitting iteration #3.
INFO: P0_gg_hg/G3 is at 4.25 +- 0.0757 pb. Now submitting iteration #3.
INFO: P0_gg_h/G1 is at 15.84 +- 0.033 pb. Now submitting iteration #3.
INFO: Idle: 8, Running: 2, Completed: 33 [ 2m 46s ]
INFO: Idle: 7, Running: 2, Completed: 35 [ 3m 38s ]
INFO: Idle: 6, Running: 2, Completed: 37 [ 4m 25s ]
INFO: Idle: 5, Running: 2, Completed: 39 [ 5m 1s ]
INFO: Idle: 4, Running: 2, Completed: 41 [ 5m 8s ]
INFO: P0_gq_hq/G1 is at 2.672 +- 0.0112 pb. Now submitting iteration #3.
INFO: P0_qq_hg/G1 is at 0.0287 +- 0.000587 pb. Now submitting iteration #3.
INFO: P0_gg_hg/G1 is at 0.0811 +- 0.00224 pb. Now submitting iteration #4.
INFO: Survey finished for P0_gg_hg/G2 at 4.295 +- 0.0308 pb
INFO: Survey finished for P0_gg_hg/G3 at 4.285 +- 0.033 pb
INFO: Idle: 4, Running: 2, Completed: 48 [ 5m 20s ]
INFO: Idle: 3, Running: 2, Completed: 50 [ 5m 29s ]
INFO: Idle: 2, Running: 2, Completed: 52 [ 6m 41s ]
INFO: Survey finished for P0_gg_h/G1 at 15.839 +- 0.0104 pb
INFO: Survey finished for P0_gq_hq/G1 at 2.709 +- 0.0179 pb
INFO: Survey finished for P0_qq_hg/G1 at 0.02932 +- 0.00029 pb
INFO: Survey finished for P0_gg_hg/G1 at 0.0829 +- 0.00124 pb
INFO: Idle: 0, Running: 0, Completed: 57 [ 6m 42s ]
INFO: End survey
refine 10000
Creating Jobs
INFO: Refine results to 10000
INFO: Generating 10000.0 unweigthed events.
INFO: Effective Luminosity 422.175289383 pb^-1
INFO: need to improve 3 channels
Current estimate of cross-section: 27.23987 +- 0.0497405577984
INFO: Idle: 2, Running: 2, Completed: 0 [ current time: 23h43 ]
INFO: Idle: 2, Running: 2, Completed: 1 [ 5.3s ]
INFO: Idle: 2, Running: 2, Completed: 2 [ 1m 41s ]
INFO: Idle: 1, Running: 2, Completed: 3 [ 2m 56s ]
INFO: P0_gg_h/G1 is at 2233/6622 (34%) event. Resubmit 1 job at iteration 1.
INFO: found enough event for P0_gg_hg/G3
INFO: Idle: 1, Running: 1, Completed: 6 [ 3m 2s ]
INFO: P0_gg_h/G1 is at 4479/6652 (67%) event. Resubmit 1 job at iteration 2.
INFO: Idle: 0, Running: 2, Completed: 8 [ 3m 7s ]
INFO: found enough event for P0_gg_h/G1
INFO: found enough event for P0_gg_h/G1
INFO: Idle: 1, Running: 0, Completed: 10 [ 4m 16s ]
INFO: found enough event for P0_gg_hg/G2
INFO: Idle: 0, Running: 0, Completed: 11 [ 4m 16s ]
INFO: Combining runs
INFO: finish refine
refine 10000
Creating Jobs
INFO: Refine results to 10000
INFO: Generating 10000.0 unweigthed events.
INFO: Effective Luminosity 423.894841642 pb^-1
INFO: need to improve 0 channels
Current estimate of cross-section: 27.12937 +- 0.0614045740894
INFO: Idle: 0, Running: 0, Completed: 0 [ current time: 23h47 ]
INFO: Combining runs
INFO: finish refine
INFO: Combining Events

  === Results Summary for run: run_02 tag: tag_1 ===

     Cumulative sequential time for this run: 13m52s
     Cross-section : 27.13 +- 0.0614 pb
     Nb of events : 10000

INFO: No version of lhapdf. Can not run 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 1.
Splitting .lhe event file for PY8 parallelization...
Submitting Pythia8 jobs...
Pythia8 shower jobs: 0 Idle, 2 Running, 0 Done [8 seconds]

_____________________________________________________________________________________________________________________

I would be grateful if you will help.

Question information

Language:
English Edit question
Status:
Open
For:
MadGraph5_aMC@NLO Edit question
Assignee:
Valentin Hirschi Edit question
Last query:
2019-04-21
Last reply:
Maksym Ovchynnikov (name-xxx) said : #1

The full run_card is the following.

                                                              *
# run_card.dat MadEvent *
# *
# This file is used to set the parameters of the run. *
# *
# Some notation/conventions: *
# *
# Lines starting with a '# ' are info or comments *
# *
# mind the format: value = variable ! comment *
# *
# To display more options, you can type the command: *
# update full_run_card *
#*********************************************************************
#
#*******************
# Running parameters
#*******************
#
#*********************************************************************
# Tag name for the run (one word) *
#*********************************************************************
  tag_1 = run_tag ! name of the run
#*********************************************************************
# Number of events and rnd seed *
# Warning: Do not generate more than 1M events in a single run *
# If you want to run Pythia, avoid more than 50k events in a run. *
#*********************************************************************
  10000 = nevents ! Number of unweighted events requested
  0 = iseed ! rnd seed (0=assigned automatically=default))
#*********************************************************************
# Collider type and energy *
# lpp: 0=No PDF, 1=proton, -1=antiproton, 2=photon from proton, *
# 3=photon from electron *
#*********************************************************************
  1 = lpp1 ! beam 1 type
  1 = lpp2 ! beam 2 type
  6500.0 = ebeam1 ! beam 1 total energy in GeV
  6500.0 = ebeam2 ! beam 2 total energy in GeV
# To see polarised beam options: type "update beam_pol"
#*********************************************************************
# PDF CHOICE: this automatically fixes also alpha_s and its evol. *
#*********************************************************************
  nn23lo1 = pdlabel ! PDF set
  230000 = lhaid ! if pdlabel=lhapdf, this is the lhapdf number
# To see heavy ion options: type "update ion_pdf"
#*********************************************************************
# Renormalization and factorization scales *
#*********************************************************************
  False = fixed_ren_scale ! if .true. use fixed ren scale
  False = fixed_fac_scale ! if .true. use fixed fac scale
  91.188 = scale ! fixed ren scale
  91.188 = dsqrt_q2fact1 ! fixed fact scale for pdf1
  91.188 = dsqrt_q2fact2 ! fixed fact scale for pdf2
  -1 = dynamical_scale_choice ! Choose one of the preselected dynamical choices
  1.0 = scalefact ! scale factor for event-by-event scales
#*********************************************************************
# Type and output format
#*********************************************************************
  False = gridpack !True = setting up the grid pack
  -1.0 = time_of_flight ! threshold (in mm) below which the invariant livetime is not written (-1 means not written)
  3.0 = lhe_version ! Change the way clustering information pass to shower.
  True = clusinfo ! include clustering tag in output
  average = event_norm ! average/sum. Normalization of the weight in the LHEF

#*********************************************************************
# Matching parameter (MLM only)
#*********************************************************************
  1 = ickkw ! 0 no matching, 1 MLM
  1.0 = alpsfact ! scale factor for QCD emission vx
  False = chcluster ! cluster only according to channel diag
  4 = asrwgtflavor ! highest quark flavor for a_s reweight
  False = auto_ptj_mjj ! Automatic setting of ptj and mjj if xqcut >0
                                   ! (turn off for VBF and single top processes)
  30.0 = xqcut ! minimum kt jet measure between partons
#*********************************************************************
#
#*********************************************************************
# handling of the helicities:
# 0: sum over all helicities
# 1: importance sampling over helicities
#*********************************************************************
  1 = nhel ! using helicities importance sampling or not.
#*********************************************************************
# Generation bias, check the wiki page below for more information: *
# 'cp3.irmp.ucl.ac.be/projects/madgraph/wiki/LOEventGenerationBias' *
#*********************************************************************
  None = bias_module ! Bias type of bias, [None, ptj_bias, -custom_folder-]
  {} = bias_parameters ! Specifies the parameters of the module.
#
#*******************************
# Parton level cuts definition *
#*******************************
#
#
#*********************************************************************
# BW cutoff (M+/-bwcutoff*Gamma) ! Define on/off-shell for "$" and decay
#*********************************************************************
  15.0 = bwcutoff ! (M+/-bwcutoff*Gamma)
#*********************************************************************
# Apply pt/E/eta/dr/mij/kt_durham cuts on decay products or not
# (note that etmiss/ptll/ptheavy/ht/sorted cuts always apply)
#*********************************************************************
  False = cut_decays ! Cut decay products
#*********************************************************************
# Standard Cuts *
#*********************************************************************
# Minimum and maximum pt's (for max, -1 means no cut) *
#*********************************************************************
  20.0 = ptj ! minimum pt for the jets
  0.0 = ptb ! minimum pt for the b
  10.0 = pta ! minimum pt for the photons
  10.0 = ptl ! minimum pt for the charged leptons
  0.0 = misset ! minimum missing Et (sum of neutrino's momenta)
  -1.0 = ptjmax ! maximum pt for the jets
  -1.0 = ptbmax ! maximum pt for the b
  -1.0 = ptamax ! maximum pt for the photons
  -1.0 = ptlmax ! maximum pt for the charged leptons
  -1.0 = missetmax ! maximum missing Et (sum of neutrino's momenta)
  {} = pt_min_pdg ! pt cut for other particles (use pdg code). Applied on particle and anti-particle
  {} = pt_max_pdg ! pt cut for other particles (syntax e.g. {6: 100, 25: 50})
#*********************************************************************
# Minimum and maximum E's (in the center of mass frame) *
#*********************************************************************
  0.0 = ej ! minimum E for the jets
  0.0 = eb ! minimum E for the b
  0.0 = ea ! minimum E for the photons
  0.0 = el ! minimum E for the charged leptons
  -1.0 = ejmax ! maximum E for the jets
  -1.0 = ebmax ! maximum E for the b
  -1.0 = eamax ! maximum E for the photons
  -1.0 = elmax ! maximum E for the charged leptons
  {} = e_min_pdg ! E cut for other particles (use pdg code). Applied on particle and anti-particle
  {} = e_max_pdg ! E cut for other particles (syntax e.g. {6: 100, 25: 50})
#*********************************************************************
# Maximum and minimum absolute rapidity (for max, -1 means no cut) *
#*********************************************************************
  5.0 = etaj ! max rap for the jets
  -1.0 = etab ! max rap for the b
  2.5 = etaa ! max rap for the photons
  2.5 = etal ! max rap for the charged leptons
  0.0 = etajmin ! min rap for the jets
  0.0 = etabmin ! min rap for the b
  0.0 = etaamin ! min rap for the photons
  0.0 = etalmin ! main rap for the charged leptons
  {} = eta_min_pdg ! rap cut for other particles (use pdg code). Applied on particle and anti-particle
  {} = eta_max_pdg ! rap cut for other particles (syntax e.g. {6: 2.5, 23: 5})
#*********************************************************************
# Minimum and maximum DeltaR distance *
#*********************************************************************
  0.0 = drjj ! min distance between jets
  0.0 = drbb ! min distance between b's
  0.4 = drll ! min distance between leptons
  0.4 = draa ! min distance between gammas
  0.0 = drbj ! min distance between b and jet
  0.4 = draj ! min distance between gamma and jet
  0.0 = drjl ! min distance between jet and lepton
  0.0 = drab ! min distance between gamma and b
  0.0 = drbl ! min distance between b and lepton
  0.4 = dral ! min distance between gamma and lepton
  -1.0 = drjjmax ! max distance between jets
  -1.0 = drbbmax ! max distance between b's
  -1.0 = drllmax ! max distance between leptons
  -1.0 = draamax ! max distance between gammas
  -1.0 = drbjmax ! max distance between b and jet
  -1.0 = drajmax ! max distance between gamma and jet
  -1.0 = drjlmax ! max distance between jet and lepton
  -1.0 = drabmax ! max distance between gamma and b
  -1.0 = drblmax ! max distance between b and lepton
  -1.0 = dralmax ! maxdistance between gamma and lepton
#*********************************************************************
# Minimum and maximum invariant mass for pairs *
# WARNING: for four lepton final state mmll cut require to have *
# different lepton masses for each flavor! *
#*********************************************************************
  0.0 = mmjj ! min invariant mass of a jet pair
  0.0 = mmbb ! min invariant mass of a b pair
  0.0 = mmaa ! min invariant mass of gamma gamma pair
  0.0 = mmll ! min invariant mass of l+l- (same flavour) lepton pair
  -1.0 = mmjjmax ! max invariant mass of a jet pair
  -1.0 = mmbbmax ! max invariant mass of a b pair
  -1.0 = mmaamax ! max invariant mass of gamma gamma pair
  -1.0 = mmllmax ! max invariant mass of l+l- (same flavour) lepton pair
  {} = mxx_min_pdg ! min invariant mass of a pair of particles X/X~ (e.g. {6:250})
  {'default': False} = mxx_only_part_antipart ! if True the invariant mass is applied only
                       ! to pairs of particle/antiparticle and not to pairs of the same pdg codes.
#*********************************************************************
# Minimum and maximum invariant mass for all letpons *
#*********************************************************************
  0.0 = mmnl ! min invariant mass for all letpons (l+- and vl)
  -1.0 = mmnlmax ! max invariant mass for all letpons (l+- and vl)
#*********************************************************************
# Minimum and maximum pt for 4-momenta sum of leptons *
#*********************************************************************
  0.0 = ptllmin ! Minimum pt for 4-momenta sum of leptons(l and vl)
  -1.0 = ptllmax ! Maximum pt for 4-momenta sum of leptons(l and vl)
#*********************************************************************
# Inclusive cuts *
#*********************************************************************
  0.0 = ptheavy ! minimum pt for at least one heavy final state
  0.0 = xptj ! minimum pt for at least one jet
  0.0 = xptb ! minimum pt for at least one b
  0.0 = xpta ! minimum pt for at least one photon
  0.0 = xptl ! minimum pt for at least one charged lepton
#*********************************************************************
# Control the pt's of the jets sorted by pt *
#*********************************************************************
  0.0 = ptj1min ! minimum pt for the leading jet in pt
  0.0 = ptj2min ! minimum pt for the second jet in pt
  0.0 = ptj3min ! minimum pt for the third jet in pt
  0.0 = ptj4min ! minimum pt for the fourth jet in pt
  -1.0 = ptj1max ! maximum pt for the leading jet in pt
  -1.0 = ptj2max ! maximum pt for the second jet in pt
  -1.0 = ptj3max ! maximum pt for the third jet in pt
  -1.0 = ptj4max ! maximum pt for the fourth jet in pt
  0 = cutuse ! reject event if fails any (0) / all (1) jet pt cuts
#*********************************************************************
# Control the pt's of leptons sorted by pt *
#*********************************************************************
  0.0 = ptl1min ! minimum pt for the leading lepton in pt
  0.0 = ptl2min ! minimum pt for the second lepton in pt
  0.0 = ptl3min ! minimum pt for the third lepton in pt
  0.0 = ptl4min ! minimum pt for the fourth lepton in pt
  -1.0 = ptl1max ! maximum pt for the leading lepton in pt
  -1.0 = ptl2max ! maximum pt for the second lepton in pt
  -1.0 = ptl3max ! maximum pt for the third lepton in pt
  -1.0 = ptl4max ! maximum pt for the fourth lepton in pt
#*********************************************************************
# Control the Ht(k)=Sum of k leading jets *
#*********************************************************************
  0.0 = htjmin ! minimum jet HT=Sum(jet pt)
  -1.0 = htjmax ! maximum jet HT=Sum(jet pt)
  0.0 = ihtmin !inclusive Ht for all partons (including b)
  -1.0 = ihtmax !inclusive Ht for all partons (including b)
  0.0 = ht2min ! minimum Ht for the two leading jets
  0.0 = ht3min ! minimum Ht for the three leading jets
  0.0 = ht4min ! minimum Ht for the four leading jets
  -1.0 = ht2max ! maximum Ht for the two leading jets
  -1.0 = ht3max ! maximum Ht for the three leading jets
  -1.0 = ht4max ! maximum Ht for the four leading jets
#***********************************************************************
# Photon-isolation cuts, according to hep-ph/9801442 *
# When ptgmin=0, all the other parameters are ignored *
# When ptgmin>0, pta and draj are not going to be used *
#***********************************************************************
  0.0 = ptgmin ! Min photon transverse momentum
  0.4 = r0gamma ! Radius of isolation code
  1.0 = xn ! n parameter of eq.(3.4) in hep-ph/9801442
  1.0 = epsgamma ! epsilon_gamma parameter of eq.(3.4) in hep-ph/9801442
  True = isoem ! isolate photons from EM energy (photons and leptons)
#*********************************************************************
# WBF cuts *
#*********************************************************************
  0.0 = xetamin ! minimum rapidity for two jets in the WBF case
  0.0 = deltaeta ! minimum rapidity for two jets in the WBF case
#***********************************************************************
# Turn on either the ktdurham or ptlund cut to activate *
# CKKW(L) merging with Pythia8 [arXiv:1410.3012, arXiv:1109.4829] *
#***********************************************************************
  -1.0 = ktdurham
  0.4 = dparameter
  -1.0 = ptlund
  1, 2, 3, 4, 5, 6, 21, 82 = pdgs_for_merging_cut ! PDGs for two cuts above
#*********************************************************************
# maximal pdg code for quark to be considered as a light jet *
# (otherwise b cuts are applied) *
#*********************************************************************
  4 = maxjetflavor ! Maximum jet pdg code
#*********************************************************************
#
#*********************************************************************
# Store info for systematics studies *
# WARNING: Do not use for interference type of computation *
#*********************************************************************
  True = use_syst ! Enable systematics studies
#
  systematics = systematics_program ! none, systematics [python], SysCalc [depreceted, C++]
['--mur=0.5,1,2', '--muf=0.5,1,2', '--pdf=errorset'] = systematics_arguments ! see: https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Systematics#Systematicspythonmodule
# Syscalc is deprecated but to see the associate options type'update syscalc'#*********************************************************************
# Additional hidden parameters
#*********************************************************************
  ['--mur=0.5,1,2', '--muf=0.5,1,2', '--pdf=errorset'] = systematics_arguments # Choose the argment to pass to the systematics command. like --mur=0.25,1,4. Look at the help of the systematics function for more details

Maksym Ovchynnikov (name-xxx) said : #2

In addition, the size of .hepmc files in split_0 and split_1 folders constantly increases during the run and can be as large as 1 GB each. It seems that this is abnormal...

Maksym Ovchynnikov (name-xxx) said : #3

Additional info. If I run run_shower.sh, then it generates (in terminal) some event listing, after the end of which it writes typically the following errors and warnings:
 PYTHIA Error in StringFragmentation::fragment: stuck in joining
 PYTHIA Error in Pythia::next: hadronLevel failed; try again
 PYTHIA Warning in StringFragmentation::fragmentToJunction: bad convergence junction rest frame
Pythia::next(): 1000 events have been generated
 PYTHIA Error in StringFragmentation::fragmentToJunction: caught in junction flavour loop
 PYTHIA Warning in Pythia::check: not quite matched particle energy/momentum/mass

The .log files in split folders contain the following information:

---------------------------------------
 PYTHIA Error in StringFragmentation::fragment: stuck in joining
 PYTHIA Error in Pythia::next: hadronLevel failed; try again
 PYTHIA Warning in StringFragmentation::fragmentToJunction: bad convergence junction rest frame

 Pythia::next(): 1000 events have been generated
 PYTHIA Error in StringFragmentation::fragmentToJunction: caught in junction flavour loop
 PYTHIA Warning in Pythia::check: not quite matched particle energy/momentum/mass

 Pythia::next(): 2000 events have been generated

 Pythia::next(): 3000 events have been generated
 PYTHIA Warning in TauDecays::decay: maximum decay weight exceeded in tau decay
 PYTHIA Warning in Pythia::check: energy-momentum not quite conserved
 PYTHIA Warning in SimpleTimeShower::findMEcorr: ME weight above PS one

 Pythia::next(): 4000 events have been generated
 PYTHIA Warning in SimpleTimeShower::pTnext: negative dipole mass.
 PYTHIA Error in SimpleSpaceShower::pT2nearThreshold: stuck in loop

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