To Resolve a Missing Component Problem
When a missing component cannot be retrieved, you can do the following.
1. Right-click the component in the Model Tree and choose Retrieve Missing Component. The File Open dialog box opens.
2. Browse to the directory with the component, select it and click Open. The component is assembled.
When the placement references are missing the Component Placement tab opens. Select placement references and click .
After recovering from an error, save the new version of the assembly before exiting.