ERROR IN FRITZ - MODULE: PythiaHandler 'process' / Could not initialise Pythia for MG5

[janmaratas]

Hi all,

I'm wondering what could be the source of this error:

ERROR IN FRITZ - MODULE: PythiaHandler 'process'
MESSAGE: could not initialise Pythia for MG5. Is MadGraph correctly installed at /Users/jmmaratas/Softwares/MadGraph5_aMCatNLO_v3.5.1 ?
-----> IMMEDIATE ABORT!

I do have MadGraph installed at that directory.

I have Pythia8 v2.45 and MadGraph5_aMC@NLO v3.5.1.

Cheers,

Jan