issue with color sum

[taarchira]

Hi,

I wrote (modified the model: https://feynrules.irmp.ucl.ac.be/wiki/Sextets) an UFO file using Feynrules for a model consists of colored sextets. When I am trying to calculate the decay width (six3 > six2~ six2~) in Madgraph (MDG5), it is showing me error as follows. Could anyone please guide me how to resolve this issue? I am attaching the UFO file for the vertices. Let me know if any additional information is needed. Any help will be highly appreciated :-)

"
Command "output" interrupted with error:
ValueError : String 1/8 Epsilon(-1017,-1012,-1013) T(-1017,-1009) T(-1016,-1010) T(-1015,-1011) Epsilon(-1014,-1015,-1016) T(-1014,-1006) T(-1013,-1007) T(-1012,-1008) EpsilonBar(-1009,-1008,-1007) EpsilonBar(-1006,-1011,-1010) cannot be simplified to a number!
Please report this bug on https://bugs.launchpad.net/madgraph5
More information is found in 'MG5_debug'.
Please attach this file to your report.
"

[Olivier Mattelaer (olivier-mattelaer)]

Please check:
https://bugs.launchpad.net/bugs/1677719

Looks like a similar issue in your UFO input file.
If that does not help, please contact FR author.

Cheers,

Olivier

[taarchira (taarchira)]

Dear Olivier,
Thanks!