Because data of a LabVIEW class is private, you can bundle or unbundle only wires of LabVIEW class types in VIs that are members of that class. This VI is not a member of the LabVIEW class.

To correct this error, you can add this VI to the class or you can bundle or unbundle the data on the block diagram(s) of the subVI(s) the developer of the class created. If a developer created subVI(s) for the class, you can find the subVI(s) under the class in the Project Explorer window.