Hello, I am trying to use the model.avg function after installing MuMIn for a list of models but an error arises each time stating that R could not find ".getRank". I am using a mac but not sure if this is the problem? My code is as follows: model.avg(model.list), where model.list was the object created from a list of glm models. Any help or suggestions to correcting my code to resolve this issue would be greatly appreciated! Thanks, Nikki Heim.