Comment 8 for bug 1886241

Hi Olivier,
Yes, I tried it again today and did not work. This is the print on the screen for the installation of lhapdf6:
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MG5_aMC>install lhapdf6 --force
   You are installing 'lhapdf6', please cite ref(s): arXiv:1412.7420.
Downloading the HEPToolInstaller at:
   http://madgraph.physics.illinois.edu/Downloads/HEPToolsInstaller/HEPToolsInstaller_V131.tar.gz
Now installing lhapdf6. Be patient...
Removing existing installation of tool 'lhapdf6' in '/Users/emrocar/Documents/MG5_aMC_v2_7_3/HEPTools'.
Fetching data with command:
  curl -OL https://lhapdf.hepforge.org/downloads/LHAPDF-6.2.3.tar.gz
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 107 100 107 0 0 359 0 --:--:-- --:--:-- --:--:-- 359
100 107 100 107 0 0 275 0 --:--:-- --:--:-- --:--:-- 275
100 733k 0 733k 0 0 1223k 0 --:--:-- --:--:-- --:--:-- 1223k
Installing tool 'lhapdf6'...
    > Follow the installation progress by running the command below in a separate terminal)
    > tail -f /Users/emrocar/Documents/MG5_aMC_v2_7_3/HEPTools/lhapdf6/lhapdf6_install.log
Successful installation of 'lhapdf6' in '/Users/emrocar/Documents/MG5_aMC_v2_7_3/HEPTools'.
lhapdf6 successfully installed in /Users/emrocar/Documents/MG5_aMC_v2_7_3/HEPTools.
save options lhapdf
save configuration file to /Users/emrocar/Documents/MG5_aMC_v2_7_3/input/mg5_configuration.txt
MG5_aMC>
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I have also attached the 'lhapdf6_install.log' file for your review. Interestingly, it says at the bottom:
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/Users/emrocar/Documents/MG5_aMC_v2_7_3/HEPTools/HEPToolsInstallers/installLHAPDF6.sh: line 58: wget: command not found
tar: Error opening archive: Failed to open 'NNPDF23_lo_as_0130_qed.tar.gz'
 Finished LHAPDF6 installation
-------------------

The folder HEPTools/lhapdf6/share/LHAPDF contained only two files, i.e. 'lhapdf.conf' and 'pdfsets.index', so I copied manually the download that you indicated in your message into that folder. This appears to have solved the issue; now the systematics computation runs ok. Unfortunately, this seems to have generated other issues with my existing UFO but this is most likely to be another topic altogether, so, I will ask elsewhere.

Many thanks,
Emilio.