Hi Michele
Yes this is possible, you can write something like this
AnyVar ModelEnvelope = sum({Main.Model.HumanModel.Right.Leg.Mus.GluteusMaximus1.Activity,
Main.Model.HumanModel.Right.Leg.Mus.GluteusMaximus2.Activity,Main.Model.HumanModel.Right.Leg.Mus.GluteusMaximus3.Activity});
You can also use a search function and write e.g.
AnyString MUS_Keyword ="Gluteus"
AnySearchFun sf_mus_force ={
Search ="..REF_TO_MUSCLE_FOLDER_HERE." + .MUS_Keyword + "*.Ft";
}
AnyVector vec_mus_force=sf_mus_force();
AnyVar SumForce=sum(vec_mus_force);
Best regards
Søren