Block mass of u d e mu

Looks like the UFO model that you use assume such zero mass.
IN such case the only solution is to change your UFO model with one that does not have such restriction.

If such restriction of mass is from a restriction file, you can try to do
import model XXXXXX-full
to bypass the default restriction that can exists in the model.
If this crash/still has zero mass, then you need to go in touch with the model authors.

Cheers,

Olivier

> On 29 Dec 2021, at 06:01, ouseph cj <email address hidden> wrote:
>
> New question #700032 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/700032
>
> Dear Madgraph Experts,
>
> I study heavy neutrino decay (Mn = 0.1GeV, 1GeV) into charged leptons.
> I need to change the default value ("0") of the mass of "quarks and leptons" in the parameter card to the actual value.
> I changed their respective masses, but during the run, they automatically reset to zero. Is there a way to change their mass?
>
>
> Best
> Melbin
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Dear Oliver,
Thanks for the response, when I removed the Massless.rst from the following command during the generation off the UFO file, I could able to generate madgraph output with all the masses.

LoadRestriction["DiagonalCKM.rst", "Massless.rst"]

Best
Ouseph