Hello Mohammadreza,
You may need do use a different version of the model based on what version of OpenSim you are using. If using Opensim 4.0 you have to use an updated model, not the one found in the paper. You should be able to find the 4.0 model in a different topic in this forum.

Hello, The paper "How tibiofemoral alignment and contact locations affect predictions of medial and lateral tibiofemoral contact forces" by Lerner et al. discusses the importance of the tibiofemoral alignment angle along with the medial and lateral contact locations for knee joint contact data, but ...