MadGraph5_aMC@NLO

Error detected in "output electron_positron_muon_antimuon" write debug file MG5_debug If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo str : No Fortran Compiler detected! Please install one

Asked by Bhim

Hi I am new to Madgraph. I just tried to generate the process I stuck in first line.

Here is the details what I got

MG5_aMC>generate e- e+ > mu- mu+
INFO: Checking for minimal orders which gives processes.
INFO: Please specify coupling orders to bypass this step.
INFO: Trying process: e- e+ > mu- mu+ WEIGHTED<=4 @1
INFO: Process has 2 diagrams
1 processes with 2 diagrams generated in 0.014 s
Total: 1 processes with 2 diagrams
MG5_aMC>output electron_positron_muon_antimuon
INFO: initialize a new directory: electron_positron_muon_antimuon
INFO: remove old information in electron_positron_muon_antimuon
INFO: Organizing processes into subprocess groups
INFO: Generating Helas calls for process: e- e+ > mu- mu+ WEIGHTED<=4 @1
INFO: Processing color information for process: e- e+ > mu- mu+ @1
INFO: Creating files in directory P1_ll_ll
INFO: Generating Feynman diagrams for Process: e- e+ > mu- mu+ WEIGHTED<=4 @1
INFO: Finding symmetric diagrams for subprocess group ll_ll
Generated helas calls for 1 subprocesses (2 diagrams) in 0.010 s
Wrote files for 8 helas calls in 0.064 s
ALOHA: aloha creates FFV1 routines
ALOHA: aloha creates FFV2 routines
ALOHA: aloha creates FFV4 routines
save configuration file to /Users/bhimbam/electron_positron_muon_antimuon/Cards/me5_configuration.txt
Error detected in "output electron_positron_muon_antimuon"
write debug file MG5_debug
If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo
str : No Fortran Compiler detected! Please install one

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

You need to install a fortran compiler. Looks like you doe not have one available globally.
On unix, you can use your pacakage manager and install gcc which will include gfortran.
On Mac, you can install gfortran (I would not advise to install gcc) from this page:http://hpc.sourceforge.net/

Cheers,

Olivier

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Bhim (bbbam) said : 		#2

Thank you it worked.