Fotran compilation fails with v3.5.2

[Maximilian Horzela]

When trying to generate a sample with Herwig7 using MadGraph and OpenLoops for the MEs, the generation of the ME with MG works fine and also the generation of the helas calls. However, when it tries to compile the created processes with gfortran I get errors like:

  346 | LNJAMP(6) = (2.000000000000000D+00)*TMP_JAMP(6)
      | 1
Error: Function 'tmp_jamp' at (1) has no IMPLICIT type
make: *** [makefile:199: all] Error 1

I have attached the full MG.log for further information.

MG version is 3.5.2 and I am loading it from CVMFS, LCG stack 105.

[Maximilian Horzela (mhorzela)]

I get a similar error but with less verbose log message with MG 3.4.2.

MG.log attached

[Olivier Mattelaer (olivier-mattelaer)]

Hi,

Thanks a lot for reporting.
The following patch does fix the associated fortran error but I'm not able to test the full framework with herwig.

Obviously since 3.6.0 is not yet released you will need to install it yourself (which is so easy for madgraph)

Thanks,

Olivier

https://github.com/mg5amcnlo/mg5amcnlo/commit/10d6ff181875eea21e40a45f9aa9fdf2f6863348