compilation fails for NLO processes: StdHep

Asked by Harikrishnan Ramani

Hello Authors,
I am able to generate tree level processes, and the new gg->WW [QCD] processes, where the process starts at 1 loop.
But when I try to run loop processes that have a tree level contribution my output fails.

Error detected in "output dynlo"
write debug file MG5_debug
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MadGraph5Error : A compilation Error occurs when trying to compile /Users/harikrishnan/Downloads/MG5_aMC_v2_3_2/vendor/StdHEP.
 The compilation fails with the following output message:
     test -d ./bin || mkdir -p ./bin
     test -d ./lib || mkdir -p ./lib
     (cd mcfio/src; make all) > log.mcfio.$$ 2>&1
     make: *** [mcfio] Error 2

 Please try to fix this compilations issue and retry.
 Help might be found at
 If you think that this is a bug, you can report this at

I understand this was solved in an earlier error thread(231556) but changing 64->32 bit or toggling with DARWINLIBS = -lSystemStubs do not seem to work for me though.

MacOSX-Yosemite 10.10
GNU Fortran (Homebrew gcc 5.2.0) 5.2.0
gcc-5 (Homebrew gcc 5.2.0) 5.2.0
Python 2.7.6

Thank you,

Question information

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MadGraph5_aMC@NLO Edit question
Paolo Torrielli Edit question
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Paolo Torrielli (paolo-torrielli) said :

Hello Harikrishnan,

I would suggest you to follow the indications for the by-hand compilation of StdHEP that
are given at the following link

in particular, see comment number #1.

This way, you should be able to see what goes wrong in particular during the compilation,
and if you get a further error, please attach the message to your next comment.

Let me know,

Revision history for this message
Harikrishnan Ramani (harikrishramani) said :

I think there are some serious problems with madgraph and brew installed gcc package. i will update you if i manage to fix this.
Thank you

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