pythia index problem

[diego redigolo]

Hi,

pythia does not work if I include jet matching it stops and gives an error before creating the matching plots

Create matching plots for Pythia8
Command "generate_events run_01" interrupted with error:
IndexError : list index out of range
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/Users/diego/Documents/MG5_aMC_v2_6_1/check_matching/run_01_tag_1_debug.log'.
Please attach this file to your report.

I am using python 2.7 and gcc-7 installed by homebrew and last madgraph release (MG5_aMC_v2.6.1).

Do you know what is going on?

Thanks for your help

Diego

[Olivier Mattelaer (olivier-mattelaer)]

Hi,

This sounds the same problem as the one here:
https://bugs.launchpad.net/mg5amcnlo/+bug/1745695

i.e. a mess up in your installation.
On mac I strongly discourage to use gcc.
my advice is to install ONLY gfortran (and not from homebrew but from http://hpc.sourceforge.net/)

That way you use gfortran+clang and have a fully clean installation without any mess around with c++/g++/... sometimes pointing to clang and sometimes to gcc

Cheers,

Olivier