I am trying to probe my harmonic study results to evaluate the amplification of the model at various points.  If I select a Response Graph from the solutions I do not have the option to choose Predefine locations.  I added a few workflow sensitive sensors on the assembly but for some reason I do not have an option to select them because Predefined locations is not available.  It is difficult to pull the node from the mesh because I adjust the model and re-mesh.  Has anyone had this issue, and know why this otion is not active?

Thank you.