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Dear MG5 teams,
i try to install lhapdf6 in madgraph using the command
MG5_aMC>install lhapdf6

all the time i face the issue

File "/home/said/Desktop/newversion/MG5_aMC_v3_4_1/HEPTools/HEPToolsInstallers/HEPToolInstaller.py", line 1574, in
finalize_installation(target_tool)
File "/home/said/Desktop/newversion/MG5_aMC_v3_4_1/HEPTools/HEPToolsInstallers/HEPToolInstaller.py", line 1250, in finalize_installation
os.symlink(os.path.relpath(path,pjoin(_prefix,'lib')),
FileExistsError: [Errno 17] File exists: '../lhapdf6_py3/lib/libLHAPDF.a' -> '/home/said/Desktop/newversion/MG5_aMC_v3_4_1/HEPTools/lib/libLHAPDF.a'
Command "install lhapdf6" interrupted with error:
InvalidCmd : Installation of lhapdf6_py3 failed.

also, i try to intall lhapdf in free folder following these commands
./configure --prefix=/path/for/installation
make
make install
i get this message from the first command
checking build system type... Invalid configuration /home/said/Desktop/lhapdf-insatll/install-LHA': machine /home/said/Desktop/lhapdf-insatll/install' not recognized
configure: error: /bin/bash config/config.sub /home/said/Desktop/lhapdf-insatll/install-LHA failed

Hi,

I get the following error message in madgraph : Command "generate p p > t t~ WEIGHTED=4" interrupted with error:
InvalidCmd : model order WEIGHTED not valid for this model (valid one are: QCD, QED, EW, EW^2, aEW, aS). Please correct

What I do not understand is that the command worked fine with 2.9.9, and now that I have uninstalled this version and now use the version 3.1.1, it does not work anymore.

Any advice, please ?

Thanks

good morning

I have just download Madgraph to do loop calculation.
I got this message
is there a file should be edited or packages need to be installed?

First output using loop matrix-elements has been detected. Now asking for loop reduction:
For loop computations, MadLoop requires dedicated tools to perform the reduction of loop Feynman diagrams using OPP-based and/or TIR approaches.

Which one do you want to install? (this needs to be done only once)

1. cuttools (OPP) [0711.3596] : will be installed (required)
2. iregi (TIR) [1405.0301] : will be installed (required)
3. ninja (OPP) [1403.1229] : /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/ninja/lib
4. collier (TIR) [1604.06792] : /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/HEPTools/collier
5. golem (TIR) [0807.0605] : do not install
   You can:
   -> hit 'enter' to proceed
   -> type a number to cycle its options
   -> enter the following command:
   {tool_name} [install|noinstall|{prefixed_installation_path}]

If you are unsure about what this question means, just type enter to proceed. [300s to answer]

set ninja /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/ninja/lib
/Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/ninja/lib does not seem to correspond to a valid ninja lib . Please enter the full PATH/TO/ninja/lib .
You will NOT be able to run ninja otherwise.

save options ninja
save configuration file to /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/input/mg5_configuration.txt
save options ninja
save configuration file to /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/input/mg5_configuration.txt
set collier /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/HEPTools/collier
/Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/HEPTools/collier does not seem to correspond to a valid collier lib . Please enter the full PATH/TO/collier/lib .
You will NOT be able to run collier otherwise.

save options collier
save configuration file to /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/input/mg5_configuration.txt
save options collier
save configuration file to /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/input/mg5_configuration.txt
set golem ''
save options golem
save configuration file to /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/input/mg5_configuration.txt
save options golem
save configuration file to /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/input/mg5_configuration.txt
INFO: initialize a new directory: g
INFO: remove old information in g
WARNING: The ninja reduction library could not be found with PATH:/Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/HEPTools/lib specified in mg5_configuration.txt. It will not be available.
WARNING: The collier reduction library could not be found with PATH:/Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/HEPTools/lib specified in mg5_configuration.txt. It will not be available.
INFO: Organizing processes into subprocess groups
INFO: Generating Helas calls for process: g g > h e+ e- WEIGHTED<=12 [ noborn = QCD ]
INFO: Processing color information for loop process: g g > h e+ e- [ noborn = QCD ]
INFO: Creating color matrix loop process: g g > h e+ e- WEIGHTED<=12 [ noborn = QCD ]
INFO: Creating files in directory /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/bin/g/SubProcesses/PV0_0_1_gg_hepem
INFO: Computing diagram color coefficients
INFO: Drawing loop Feynman diagrams for Process: g g > h e+ e- WEIGHTED<=12 [ noborn = QCD ]
INFO: Creating files in directory P0_gg_hll
INFO: Generating Feynman diagrams for Process: g g > h e+ e- WEIGHTED<=12 [ noborn = QCD ]
INFO: Finding symmetric diagrams for subprocess group gg_hll
Generated helas calls for 1 subprocesses (32 diagrams) in 0.115 s
ALOHA: aloha starts to compute helicity amplitudes
ALOHA: aloha creates 21 routines in 0.676 s
save configuration file to /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/bin/g/Cards/me5_configuration.txt
INFO: Use Fortran compiler gfortran
INFO: Use c++ compiler clang
INFO: Generate web pages
Output to directory /Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/bin/g done.
Type "launch" to generate events from this process, or see
/Users/sarahalanazi/Desktop/TOOLS/MG5_aMC_v3_4_0/bin/g/README
Run "open index.html" to see more information about this process.
MG5_aMC>