Check the version of embedded visualization, using [Help] – [About] in Teamcenter. The [More Information] dialog will mention the version. This error typically indicates that the embedded viewer installed is not compatible with RAC. They are probably not exactly the same version. Usually, the error can be ignored in the meantime. It is just a warning that some part is not available because of the incompatibility. The problem is resolved after patching the embedded visualization to the same level as Teamcenter.