Dileptonic ttbar decay at NLO using Madspin

Hi

I am trying to generate events for the following dileptonic process:

                                      p p > t t~, (t > b w+, w+ > l+ vl), (t~ > b~ w- , w- > l- vl~)

at NLO. Here I refrained from adding [QCD] command in Madgraph due to syntax mismatch. Instead, I tried decaying it using Madspin where I specify the particular decay chain for t and t~. So the commands follows as:

                             generate p p > t t~ [QCD]

and running the command which after a few steps give me the options for the different parameter cards. One being the madspin card, in which I specified the decay chain. Then while running the events, Madgraph crashes with the following error:

Command "launch auto " interrupted with error:
Exception : Some of the run failed: Please read /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/PROCNLO_loop_sm_0/Events/run_01/events.lhe.gz_0.lhe_tag_1_debug.log
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/PROCNLO_loop_sm_0/run_01_tag_1_debug.log'.
Please attach this file to your report.

The report is as follows (verbatim):

#************************************************************
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 5.3.5.4 *
#* *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https://server06.fynu.ucl.ac.be/projects/madgraph *
#* and *
#* http://amcatnlo.cern.ch *
#* *
#************************************************************
#* *
#* Command File for aMCatNLO *
#* *
#* run as ./bin/aMCatNLO.py filename *
#* *
#************************************************************
reweight /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/PROCNLO_loop_sm_0/Events/run_01/events.lhe.gz_0.lhe -from_cards --multicore=create
Traceback (most recent call last):
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/PROCNLO_loop_sm_0/bin/internal/extended_cmd.py", line 1546, in onecmd
    return self.onecmd_orig(line, **opt)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/PROCNLO_loop_sm_0/bin/internal/extended_cmd.py", line 1495, in onecmd_orig
    return func(arg, **opt)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/PROCNLO_loop_sm_0/bin/internal/common_run_interface.py", line 2250, in do_reweight
    reweight_cmd.import_command_file(path)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/madgraph/interface/extended_cmd.py", line 1694, in import_command_file
    self.exec_cmd(line, precmd=True)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/madgraph/interface/extended_cmd.py", line 1575, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/madgraph/interface/extended_cmd.py", line 1495, in onecmd_orig
    return func(arg, **opt)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/madgraph/various/misc.py", line 109, in f_with_no_logger
    out = f(self, *args, **opt)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/madgraph/interface/reweight_interface.py", line 566, in do_launch
    weight = self.calculate_weight(event)
  File "/afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/madgraph/interface/reweight_interface.py", line 1038, in calculate_weight
    self.pdf = lhapdf.mkPDF(self.banner.run_card.get_lhapdf_id())
AttributeError: 'NoneType' object has no attribute 'mkPDF'
Value of current Options:
             pythia8_path : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/HEPTools/pythia8
                hwpp_path : None
              thepeg_path : None
               hepmc_path : None
         madanalysis_path : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/MadAnalysis
        madanalysis5_path : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/HEPTools/madanalysis5/madanalysis5
          pythia-pgs_path : None
                  td_path : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/td
             delphes_path : None
      exrootanalysis_path : None
             syscalc_path : None
               rivet_path : None
                yoda_path : None
                   lhapdf : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/HEPTools/lhapdf6_py3/bin/lhapdf-config
               lhapdf_py2 : None
               lhapdf_py3 : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/HEPTools/lhapdf6_py3/bin/lhapdf-config
                  timeout : 60
            f2py_compiler : None
        f2py_compiler_py2 : None
        f2py_compiler_py3 : None
              web_browser : None
               eps_viewer : None
              text_editor : None
         fortran_compiler : None
             cpp_compiler : None
              auto_update : 7
             cluster_type : condor
    cluster_status_update : (600, 30)
         cluster_nb_retry : 1
       cluster_local_path : None
       cluster_retry_wait : 300
             stdout_level : None
   automatic_html_opening : True
      notification_center : True
                 run_mode : 2
            cluster_queue : None
             cluster_time : None
             cluster_size : 100
           cluster_memory : None
                  nb_core : 10
        cluster_temp_path : None
                 mg5_path : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4
mg5amc_py8_interface_path : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/HEPTools/MG5aMC_PY8_interface
                  fastjet : None
                    eMELA : None
                    golem : None
                    ninja : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/HEPTools/lib
                  collier : /afs/cern.ch/user/a/ahossain/MG5_aMC_v3_5_4/HEPTools/lib
#************************************************************
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 3.5.4 2024-04-05 *
#* *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https://server06.fynu.ucl.ac.be/projects/madgraph *
#* *
#************************************************************
#* *
#* Command File for MadGraph5_aMC@NLO *
#* *
#* run as ./bin/mg5_aMC filename *
#* *
#************************************************************
set group_subprocesses Auto
set ignore_six_quark_processes False
set low_mem_multicore_nlo_generation False
set complex_mass_scheme False
set include_lepton_initiated_processes False
set gauge unitary
set loop_optimized_output True
set loop_color_flows False
set max_npoint_for_channel 0
set default_unset_couplings 99
set max_t_for_channel 99
set zerowidth_tchannel True
set nlo_mixed_expansion True
import model sm
define p = g u c d s u~ c~ d~ s~
define j = g u c d s u~ c~ d~ s~
define l+ = e+ mu+
define l- = e- mu-
define vl = ve vm vt
define vl~ = ve~ vm~ vt~
import model loop_sm
generate p p > t t~ [QCD]
output
######################################################################
## PARAM_CARD AUTOMATICALY GENERATED BY MG5 ####
######################################################################
###################################
## INFORMATION FOR MASS
###################################
BLOCK MASS #
      5 4.700000e+00 # mb
      6 1.730000e+02 # mt
      15 1.777000e+00 # mta
      23 9.118800e+01 # mz
      25 1.250000e+02 # mh
      1 0.000000e+00 # d : 0.0
      2 0.000000e+00 # u : 0.0
      3 0.000000e+00 # s : 0.0
      4 0.000000e+00 # c : 0.0
      11 0.000000e+00 # e- : 0.0
      12 0.000000e+00 # ve : 0.0
      13 0.000000e+00 # mu- : 0.0
      14 0.000000e+00 # vm : 0.0
      16 0.000000e+00 # vt : 0.0
      21 0.000000e+00 # g : 0.0
      22 0.000000e+00 # a : 0.0
      24 8.041900e+01 # w+ : cmath.sqrt(mz__exp__2/2. + cmath.sqrt(mz__exp__4/4. - (aew*cmath.pi*mz__exp__2)/(gf*sqrt__2)))
###################################
## INFORMATION FOR SMINPUTS
###################################
BLOCK SMINPUTS #
      1 1.325070e+02 # aewm1
      2 1.166390e-05 # gf
      3 1.190000e-01 # as (note that parameter not used if you use a pdf set)
###################################
## INFORMATION FOR YUKAWA
###################################
BLOCK YUKAWA #
      5 4.700000e+00 # ymb
      6 1.730000e+02 # ymt
      15 1.777000e+00 # ymtau
###################################
## INFORMATION FOR DECAY
###################################
DECAY 6 1.491500e+00 # wt
DECAY 23 2.441404e+00 # wz
DECAY 24 2.047600e+00 # ww
DECAY 25 6.382339e-03 # wh
DECAY 1 0.000000e+00 # d : 0.0
DECAY 2 0.000000e+00 # u : 0.0
DECAY 3 0.000000e+00 # s : 0.0
DECAY 4 0.000000e+00 # c : 0.0
DECAY 5 0.000000e+00 # b : 0.0
DECAY 11 0.000000e+00 # e- : 0.0
DECAY 12 0.000000e+00 # ve : 0.0
DECAY 13 0.000000e+00 # mu- : 0.0
DECAY 14 0.000000e+00 # vm : 0.0
DECAY 15 0.000000e+00 # ta- : 0.0
DECAY 16 0.000000e+00 # vt : 0.0
DECAY 21 0.000000e+00 # g : 0.0
DECAY 22 0.000000e+00 # a : 0.0
###################################
## INFORMATION FOR QNUMBERS 82
###################################
BLOCK QNUMBERS 82 # gh
      1 0 # 3 times electric charge
      2 1 # number of spin states (2s+1)
      3 8 # colour rep (1: singlet, 3: triplet, 8: octet)
      4 1 # particle/antiparticle distinction (0=own anti)

#***********************************************************************
# MadGraph5_aMC@NLO *
# *
# run_card.dat aMC@NLO *
# *
# This file is used to set the parameters of the run. *
# *
# Some notation/conventions: *
# *
# Lines starting with a hash (#) are info or comments *
# *
# mind the format: value = variable ! comment *
# *
# Some of the values of variables can be list. These can either be *
# comma or space separated. *
# *
# To display additional parameter, you can use the command: *
# update to_full *
#***********************************************************************
#
#*******************
# Running parameters
#*******************
#
#***********************************************************************
# Tag name for the run (one word) *
#***********************************************************************
  tag_1 = run_tag ! name of the run
#***********************************************************************
# Number of LHE events (and their normalization) and the required *
# (relative) accuracy on the Xsec. *
# These values are ignored for fixed order runs *
#***********************************************************************
  1000 = nevents ! Number of unweighted events requested
  -1.0 = req_acc ! Required accuracy (-1=auto determined from nevents)
  -1 = nevt_job ! Max number of events per job in event generation.
                 ! (-1= no split).
#***********************************************************************
# Output format
#***********************************************************************
  -1.0 = time_of_flight ! threshold (in mm) below which the invariant livetime is not written (-1 means not written)
  average = event_norm ! average/sum/bias. Normalization of the weight in the LHEF
#***********************************************************************
# Number of points per itegration channel (ignored for aMC@NLO runs) *
#***********************************************************************
  0.01 = req_acc_fo ! Required accuracy (-1=ignored, and use the
                     ! number of points and iter. below)
# These numbers are ignored except if req_acc_FO is equal to -1
  5000 = npoints_fo_grid ! number of points to setup grids
  4 = niters_fo_grid ! number of iter. to setup grids
  10000 = npoints_fo ! number of points to compute Xsec
  6 = niters_fo ! number of iter. to compute Xsec
#***********************************************************************
# Random number seed *
#***********************************************************************
  0 = iseed ! rnd seed (0=assigned automatically=default))
#***********************************************************************
# Collider type and energy *
# 0 = no PDF *
# 1/-1 = proton/antiproton *
# 3/-3 = electron/positron with ISR/Beamstrahlung; *
# 4/-4 = muon/antimuon with ISR/Beamstrahlung; *
#***********************************************************************
  1 = lpp1 ! beam 1 type (0 = no PDF)
  1 = lpp2 ! beam 2 type (0 = no PDF)
  6500.0 = ebeam1 ! beam 1 energy in GeV
  6500.0 = ebeam2 ! beam 2 energy in GeV
#***********************************************************************
# PDF choice: this automatically fixes also alpha_s(MZ) and its evol. *
#***********************************************************************
  nn23nlo = pdlabel ! PDF set
  244600 = lhaid ! If pdlabel=lhapdf, this is the lhapdf number. Only
              ! numbers for central PDF sets are allowed. Can be a list;
              ! PDF sets beyond the first are included via reweighting.
  0 = pdfscheme ! the scheme of the input PDFs. 0->MSbar; 1->DIS
             ! 2->eta (leptonic); 3->beta (leptonic)
      ! 4->mixed (leptonic); 6->delta (leptonic)
                    ! if pdlabel==emela, this is set automatically
#***********************************************************************
# The following block is specific to lepton collisions (lpp=+-3) *
#***********************************************************************
  True = photons_from_lepton ! whether to include or not photons from
                              ! lepton ISR
#***********************************************************************
# Include the NLO Monte Carlo subtr. terms for the following parton *
# shower (HERWIG6 | HERWIGPP | PYTHIA6Q | PYTHIA6PT | PYTHIA8) *
# WARNING: PYTHIA6PT works only for processes without FSR!!!! *
#***********************************************************************
  PYTHIA8 = parton_shower
  1.0 = shower_scale_factor ! multiply default shower starting
                            ! scale by this factor
  False = mcatnlo_delta ! use MC@NLO-Delta matching, arXiv:2002.12716
                        ! (only with Pythia8309 or later)
#***********************************************************************
# Renormalization and factorization scales *
# (Default functional form for the non-fixed scales is the sum of *
# the transverse masses divided by two of all final state particles *
# and partons. This can be changed in SubProcesses/set_scales.f or via *
# dynamical_scale_choice option) *
#***********************************************************************
  False = fixed_ren_scale ! if .true. use fixed ren scale
  False = fixed_fac_scale ! if .true. use fixed fac scale
  91.118 = mur_ref_fixed ! fixed ren reference scale
  91.118 = muf_ref_fixed ! fixed fact reference scale
  -1 = dynamical_scale_choice ! Choose one (or more) of the predefined
           ! dynamical choices. Can be a list; scale choices beyond the
           ! first are included via reweighting
  1.0 = mur_over_ref ! ratio of current muR over reference muR
  1.0 = muf_over_ref ! ratio of current muF over reference muF

#***********************************************************************
# Reweight variables for scale dependence and PDF uncertainty *
#***********************************************************************
  1.0, 2.0, 0.5 = rw_rscale ! muR factors to be included by reweighting
  1.0, 2.0, 0.5 = rw_fscale ! muF factors to be included by reweighting
  True = reweight_scale ! Reweight to get scale variation using the
            ! rw_rscale and rw_fscale factors. Should be a list of
            ! booleans of equal length to dynamical_scale_choice to
            ! specify for which choice to include scale dependence.
  False = reweight_pdf ! Reweight to get PDF uncertainty. Should be a
            ! list booleans of equal length to lhaid to specify for
            ! which PDF set to include the uncertainties.
#***********************************************************************
# Store reweight information in the LHE file for off-line model- *
# parameter reweighting at NLO+PS accuracy *
#***********************************************************************
  True = store_rwgt_info ! Store info for reweighting in LHE file
#***********************************************************************
# Customization of the code. List of files containing user hook function
#***********************************************************************
   = custom_fcts ! List of files containing user hook function
#***********************************************************************
# ickkw parameter: *
# 0: No merging *
# 3: FxFx Merging - WARNING! Applies merging only at the hard-event *
# level. After showering an MLM-type merging should be applied as *
# well. See http://amcatnlo.cern.ch/FxFx_merging.htm for details. *
# 4: UNLOPS merging (with pythia8 only). No interface from within *
# MG5_aMC available, but available in Pythia8. *
# -1: NNLL+NLO jet-veto computation. See arxiv:1412.8408 [hep-ph]. *
#***********************************************************************
  0 = ickkw
#***********************************************************************
#
#***********************************************************************
# BW cutoff (M+/-bwcutoff*Gamma). Determines which resonances are *
# written in the LHE event file *
#***********************************************************************
  15.0 = bwcutoff
#***********************************************************************
# Cuts on the jets. Jet clustering is performed by FastJet. *
# - If gamma_is_j, photons are also clustered with jets. *
# Otherwise, they will be treated as tagged particles and photon *
# isolation will be applied. Note that photons in the real emission *
# will always be clustered with QCD partons. *
# - When matching to a parton shower, these generation cuts should be *
# considerably softer than the analysis cuts. *
# - More specific cuts can be specified in SubProcesses/cuts.f *
#***********************************************************************
  1.0 = jetalgo ! FastJet jet algorithm (1=kT, 0=C/A, -1=anti-kT)
  0.7 = jetradius ! The radius parameter for the jet algorithm
  10.0 = ptj ! Min jet transverse momentum
  -1.0 = etaj ! Max jet abs(pseudo-rap) (a value .lt.0 means no cut)
  False = gamma_is_j ! Wether to cluster photons as jets or not
#***********************************************************************
# Cuts on the charged leptons (e+, e-, mu+, mu-, tau+ and tau-) *
# More specific cuts can be specified in SubProcesses/cuts.f *
#***********************************************************************
  0.0 = ptl ! Min lepton transverse momentum
  -1.0 = etal ! Max lepton abs(pseudo-rap) (a value .lt.0 means no cut)
  0.0 = drll ! Min distance between opposite sign lepton pairs
  0.0 = drll_sf ! Min distance between opp. sign same-flavor lepton pairs
  0.0 = mll ! Min inv. mass of all opposite sign lepton pairs
  30.0 = mll_sf ! Min inv. mass of all opp. sign same-flavor lepton pairs
#***********************************************************************
# Fermion-photon recombination parameters *
# If Rphreco=0, no recombination is performed *
#***********************************************************************
  0.1 = rphreco ! Minimum fermion-photon distance for recombination
  -1.0 = etaphreco ! Maximum abs(pseudo-rap) for photons to be recombined (a value .lt.0 means no cut)
  False = lepphreco ! Recombine photons and leptons together
  False = quarkphreco ! Recombine photons and quarks together
#***********************************************************************
# Photon-isolation cuts, according to hep-ph/9801442 *
# Not applied if gamma_is_j *
# When ptgmin=0, all the other parameters are ignored *
# More specific cuts can be specified in SubProcesses/cuts.f *
#***********************************************************************
  20.0 = ptgmin ! Min photon transverse momentum
  -1.0 = etagamma ! Max photon abs(pseudo-rap)
  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)
#***********************************************************************
# Cuts associated to MASSIVE particles identified by their PDG codes. *
# All cuts are applied to both particles and anti-particles, so use *
# POSITIVE PDG CODES only. Example of the syntax is {6 : 100} or *
# {6:100, 25:200} for multiple particles *
#***********************************************************************
  {} = pt_min_pdg ! Min pT for a massive particle
  {} = pt_max_pdg ! Max pT for a massive particle
  {} = mxx_min_pdg ! inv. mass for any pair of (anti)particles
#***********************************************************************
# Use PineAPPL to generate PDF-independent fast-interpolation grid *
# (https://zenodo.org/record/3992765#.X2EWy5MzbVo) *
#***********************************************************************
  False = pineappl ! PineAPPL switch
#***********************************************************************
# Folding parameters for S-events to reduce the number of negatively *
# weighted events. Allowed values are 1, 2, 4 or 8 for each of the *
# three variables. Typically, folding in xi_i or y_ij results in the *
# largest reduction of negatively weighted events. (arXiv:2002.12716) *
#***********************************************************************
  1, 1, 1 = folding ! correspond to folding in xi_i, y_ij, and phi_i
#***********************************************************************