User is working with an assembly and cannot perform some of the assembly options and changing to the Modeling application raised an error that No License was available. Other Users on the team are able to change to the Modeling application without error.
Go to Windows Start --> All Apps --> "Siemens NX" folder --> open "Tools- Licensing Tool" --> select "Bundle Settings".
Check the license bundles available that were not being used. Move the License Bundles that the other Users are using to the "Bundles Applied" window.
After restarting NX the User can now change to the Modeling Application and all of the Modeling and Assemblies functions are available.