I am trying to import a fortran subroutine into python code. Following this guide https://notmatthancock.github.io/2017/02/10/calling-fortran-from-python.html I have added the following line into my fortran code: However when I try to use f2py -c fireball_ES_param.f -m fireball to create fireball.so to import in my python code I get several hundreds of warnings, which might be the problem but I am not