MadGraph5_aMC@NLO

LO fixed order stays idle for a very long time after launch

Asked by Ahmed Thabt

I generated:
p p > t t~ [QCD]
and I typed launch and sat fixed_order=ON and order=LO
it gave me this:

INFO: Update the dependent parameter of the param_card.dat
INFO: Starting run
INFO: Compiling the code
INFO: For gauge cancellation, the width of 't' has been set to zero.
INFO: Using built-in libraries for PDFs
INFO: Compiling source...
INFO: ...done, continuing with P* directories
INFO: Compiling directories...
INFO: Compiling on 2 cores
INFO: Compiling P0_gg_ttx...
INFO: Compiling P0_uux_ttx...
INFO: P0_uux_ttx done.
INFO: Compiling P0_uxu_ttx...
INFO: P0_gg_ttx done.
INFO: P0_uxu_ttx done.
INFO: Checking test output:
INFO: P0_gg_ttx
INFO: Result for test_ME:
INFO: Passed.
INFO: P0_uux_ttx
INFO: Result for test_ME:
INFO: Passed.
INFO: P0_uxu_ttx
INFO: Result for test_ME:
INFO: Passed.
INFO: Starting run
INFO: Using 2 cores
INFO: Cleaning previous results
INFO: Doing fixed order LO
INFO: Setting up grids
WARNING: program /home/diable/Downloads/MG5_aMC_v2_5_1/my_ttbar_NLO/SubProcesses/P0_gg_ttx/ajob1 1 born 0 0 launch ends with non zero status: 127. Stop all computation
WARNING: program /home/diable/Downloads/MG5_aMC_v2_5_1/my_ttbar_NLO/SubProcesses/P0_gg_ttx/ajob1 2 born 0 0 launch ends with non zero status: 127. Stop all computation
INFO: Idle: 3, Running: 0, Completed: 2 [ current time: 13h49 ]

it stays at this stage for a very long time and never changes

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
Valentin Hirschi Edit question
Solved by:
Ahmed Thabt
Solved:
Last query:
Last reply:
Revision history for this message
marco zaro (marco-zaro) said : 		#1

Hi,
the message you get
WARNING: program /home/diable/Downloads/MG5_aMC_v2_5_1/my_ttbar_NLO/SubProcesses/P0_gg_ttx/ajob1 1 born 0 0 launch ends with non zero status: 127. Stop all computatio
means that jobs have crashed. You can ctrl+c and kill MG5_aMC

In order to understand the reason of the failure, can you please look at the log.txt file inside
/home/diable/Downloads/MG5_aMC_v2_5_1/my_ttbar_NLO/SubProcesses/P0_gg_ttx/born_G1
?

Let us know...
Cheers,

Marco

Revision history for this message
Ahmed Thabt (diable.sombre) said : 		#2

Text inside log.txt :

../madevent_mintFO: error while loading shared libraries: libgolem.so.0: cannot open shared object file: No such file or directory
Time in seconds: 0

Revision history for this message
marco zaro (marco-zaro) said : 		#3

Hi Ahmed,
perhaps Valentin or Hua-Sheng can help with this kind of error...
I subscribe them to the question
Cheers,

Marco

Revision history for this message
Ahmed Thabt (diable.sombre) said : 		#4

After so much pain, I fixed the problem myself. I just needed to add the golem library to LD_LIBRARY_PATH. Just type this line in terminal: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/diable/Downloads/MG5_aMC_v2_5_1/golem95/lib

Thanks marco for your insight

Revision history for this message
Valentin Hirschi (valentin-hirschi) said : 		#5

You should also be able to solve this problem by forcing to not use Golem
in MadLoop.
You can turn off the use of Golem by specifying None for the option 'golem'
in <MG_root>/input/mg5_configuration.txt.

What happens is that by default I left this option to 'auto' which means
that it will try to look for a golem installation in your environment and
link to it if found.
You must of course always have golem in your dynamic library path if you
have it installed and intend to use it.
Notice that if you own installation of Golem causes problems and you still
want to use Golem for some reason, then you can use a version directly
installed by MG5aMC, with

MG5_aMC>install Golem95

Cheers,

On Thu, Jan 5, 2017 at 12:38 PM, Ahmed Thabt <
<email address hidden>> wrote:

> Question #429764 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/429764
>
> Status: Answered => Solved
>
> Ahmed Thabt confirmed that the question is solved:
> After so much pain, I fixed the problem myself. I just needed to add the
> golem library to LD_LIBRARY_PATH. Just type this line in terminal:
> export
> LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/diable/Downloads/
> MG5_aMC_v2_5_1/golem95/lib
>
> Thanks marco for your insight
>
> --
> You received this question notification because you are subscribed to
> the question.
>

--
Valentin