The circuit model file has been loaded into the example project already, although the steps below can be used to reload the circuit model. This is typically only necessary if the circuit has been modified. For more information, please refer to How to Add a Circuit Model to the System Definition.
Circuit Model File Path: <Public Documents>\National Instruments\<NI VeriStand 20XX>\Examples\OPAL-RT\Power Electronics Add-On\Three Phase Rectifier\Circuit Model\SPS\Three_Phase_Rectifier.mdl