Command "generate_events " interrupted with error: InvalidCmd : No event file corresponding to run_01 run.

Dear all,

Apologies for asking so many questions :)

I have latest version of MadGraph on latest version of Ubuntu.

When I am trying to generate a large number of events (say 100k), the generation breaks and report an error which I find hard to understand. If I am generating a smaller number of events, all works fine.
I was wondering if there is a way to ask MadGraph to use more resources (I should have largely enough).

************************************************************
* *
* 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 3.4.1 20xx-xx-xx *
* *
* 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/workstation/Desktop/MG5_aMC_v3_4_1/h151WWemu_dilepMt/Cards/me5_configuration.txt
INFO: load configuration from /home/workstation/Desktop/MG5_aMC_v3_4_1/input/mg5_configuration.txt
INFO: load configuration from /home/workstation/Desktop/MG5_aMC_v3_4_1/h151WWemu_dilepMt/Cards/me5_configuration.txt
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
generate_events
The following switches determine which programs are run:
/================ Description =================|=========== values ===========|====== other options ======\
| 1. Choose the shower/hadronization program | shower = Pythia8 | OFF |
| 2. Choose the detector simulation program | detector = Delphes | OFF |
| 3. Choose an analysis package (plot/convert) | analysis = ExRoot | OFF |
| 4. Decay onshell particles | madspin = OFF | ON|onshell|full |
| 5. Add weights to events for new hypp. | reweight = Not Avail. | Please install module |
\=========================================================================================================/
Either type the switch number (1 to 5) to change its setting,
Set any switch explicitly (e.g. type 'shower=OFF' 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]
>
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. delphes : delphes_card.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]
>set nevents 500000
INFO: modify parameter nevents of the run_card.dat to 500000
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. delphes : delphes_card.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, ... ]
>
INFO: Update the dependent parameter of the param_card.dat
WARNING: update the strong coupling value (alpha_s) to the value from the pdf selected: 0.1190025
Generating 500000 events with run name run_06
survey run_06
INFO: compile directory
INFO: Using LHAPDF v6.5.3 interface for PDFs
Error: no DISPLAY environment variable specified
compile Source Directory
Using random number seed offset = 51
INFO: Running Survey
Creating Jobs
Working on SubProcesses
INFO: Compiling for process 1/1.
INFO: P1_gg_h_h_wplvl_wp_vll
INFO: P1_gg_h_h_wplvl_wp_vll
INFO: Idle: 1, Running: 3, Completed: 0 [ current time: 13h37 ]
INFO: Idle: 0, Running: 3, Completed: 1 [ 0.033s ]
INFO: Idle: 0, Running: 0, Completed: 4 [ 0.25s ]
INFO: End survey
refine 500000
Creating Jobs
INFO: Refine results to 500000
INFO: Generating 500000.0 unweighted events.
sum of cpu time of last step: 0 second
INFO: Effective Luminosity 1092876.2681918363 pb^-1
INFO: need to improve 2 channels
- Current estimate of cross-section: 0.54899 +- 0.00786482635854092
    P1_gg_h_h_wplvl_wp_vll
INFO: Idle: 161, Running: 48, Completed: 51 [ current time: 13h37 ]
INFO: Idle: 160, Running: 48, Completed: 52 [ current time: 13h37 ]
INFO: Idle: 92, Running: 48, Completed: 120 [ 3s ]
INFO: Idle: 20, Running: 48, Completed: 192 [ 6s ]
INFO: Idle: 0, Running: 0, Completed: 260 [ 8.9s ]
INFO: Combining runs
sum of cpu time of last step: 9m48s
INFO: finish refine
refine 500000 --treshold=0.9
No need for second refine due to stability of cross-section
INFO: Combining Events
  === Results Summary for run: run_06 tag: tag_1 ===

     Cross-section : 0.5505 +- 0.0002353 pb
     Nb of events : 500000

INFO: Running Systematics computation
INFO: Idle: 43, Running: 5, Completed: 0 [ current time: 13h39 ]
INFO: Idle: 0, Running: 47, Completed: 1 [ 39.8s ]
INFO: Idle: 0, Running: 30, Completed: 18 [ 42.9s ]
INFO: Idle: 0, Running: 11, Completed: 37 [ 46s ]
INFO: # Events generated with PDF: NNPDF23_nlo_as_0119 (230000)
INFO: # Will Compute 145 weights per event.
INFO: #***************************************************************************
#
# original cross-section: 0.5504916473017981
# scale variation: +0.889% -3.89%
# central scheme variation: +1.01e-10% -5.99%
# PDF variation: +1.06% -1.06%
#
# dynamical scheme # 1 : 0.543094 +2.1% -4.71% # \sum ET
# dynamical scheme # 2 : 0.543094 +2.1% -4.71% # \sum\sqrt{m^2+pt^2}
# dynamical scheme # 3 : 0.517512 +4.94% -7.53% # 0.5 \sum\sqrt{m^2+pt^2}
# dynamical scheme # 4 : 0.550492 +0.889% -3.89% # \sqrt{\hat s}
#***************************************************************************

INFO: End of systematics computation
store_events
INFO: Storing parton level results
INFO: End Parton
reweight -from_cards
decay_events -from_cards
INFO: Creating root files
Warning in <TTree::Bronch>: Using split mode on a class: TRootWeight with a custom Streamer
** Reading /home/workstation/Desktop/MG5_aMC_v3_4_1/h151WWemu_dilepMt/Events/run_06/unweighted_events.lhe
** [################################################################] (100.00%)
** Exiting...
Command "generate_events " interrupted with error:
InvalidCmd : No event file corresponding to run_06 run.
ln: failed to create symbolic link 'ME5_debug': File exists
quit
INFO: storing files of previous run
INFO: Done
INFO:

Best regards,
Guglielmo Coloretti