The follwing snippet shows how to perform a replace to next version for a part using the SystemWeaver API.
Example
IswLibrary library = SWConnection.Instance.Broker.GetLibrary(SWHandleUtility.ToHandle("x13000000000DEFA0")); // Create a Component IswItem component = library.CreateItem("ARAP", "Component"); // Create an Interface IswItem interfaceItemVersion1 = library.CreateItem("ARSI", "Interface"); // Release an Interface interfaceItemVersion1.Status = SWItemStatus.Released; // Create the Part with SID="ARRP" on component that points to interfaceItem. AddPart is used when Part multiplicity is * IswPart receivePort = component.AddPart("ARRP", interfaceItemVersion1); // Create a new version of the interface IswItem interfaceItemVersion2 = interfaceItemVersion1.NewVersion(); // Update the component's interface to the next version receivePort.DefObj = interfaceItemVersion2;