mg5 tutorial missing symfact.dat

[Layne Bradshaw]

I'm trying to work my way through the MG5 tutorial, but encounter the following error when trying to launch the output file:

Command "generate_events run_01" interrupted with error:
IOError : [Errno 2] No such file or directory: '/Users/Layne/research_su18/code/madgraph/MG5_aMC_v2_6_3_2/PROC_sm_1/SubProcesses/P1_gg_ttx/symfact.dat'

When I looked in the P1_gg_ttx/ directory, I noticed that I have a symfact_orig.dat file, but I don't know if this is related to the symfact.dat file that is missing

The version of anaconda I have defaults to python 3.6.3, so I am running everything in a virtual environment with python 2.7.15. This may be part of the issue, but I honestly don't know.

EDIT:

I installed anaconda with python 2.7.15 and madgraph on a new machine, and still have the same issue. I have attached the log file below

[Olivier Mattelaer (olivier-mattelaer)]

Hi,

Do I understand correctly your log, contains the line End survey?
i.e you should have see lines like:

Working on SubProcesses
INFO: P1_gg_ttx
INFO: P1_qq_ttx
INFO: Idle: 1, Running: 0, Completed: 1 [ current time: 21h05 ]
INFO: Idle: 0, Running: 1, Completed: 1 [ current time: 21h05 ]
INFO: Idle: 0, Running: 0, Completed: 2 [ 0.45s ]
INFO: End survey

Since those lines also required the presence of symfact.dat.
I'm not sure to understand how this is possible to have such crash so late.
Can you confirm this behaviour?

Thanks,

Olivier

[Layne Bradshaw (layneb)]

Hi Olivier,

The lines I see look like the following:

Working on SubProcesses

INFO: P1_gg_ttx

INFO: P1_qq_ttx

INFO: Idle: 0, Running: 0, Completed: 0 [ current time: 10h08 ]

INFO: Idle: 0, Running: 0, Completed: 0 [ current time: 10h08 ]

INFO: End survey

refine 10000

Creating Jobs

INFO: Refine results to 10000

INFO: Generating 10000.0 unweighted events

Command "generate_events run_01" interrupted with error:

IOError : [Errno 2] No such file or directory: '/Users/Layne/research_su18/code/madgraph/MG5_aMC_v2_6_3_2/PROC_sm_1/SubProcesses/P1_gg_ttx/symfact.dat'

I was able to successfully complete the tutorial after completely uninstalling Anaconda on my desktop and using just python 2.7.10 and gfortran 5.2. All I can think is that there must be some compatibility issue with the software I have on my laptop and MadGraph that I will have to look into.

Thanks,
Layne

[Olivier Mattelaer (olivier-mattelaer)]

Hi,

Ok so indeed the survey stage is not working properly but does not lead to a crash.
I have seen that stuff previously on Mac when xcode requires to validate his license before being able to use some quite basic command.

Not sure what I can do for you to help with this issue.
My only suggestion is to do the following
cd SubProcesses/P0_gg_ttx
make gensym
./gensym

The output of the last command should be something like "1 2"
By doing this manually, you should be able to find what the issue is.

Cheers,

Olivier