The Harmonic Analysis must be pre-stressed with the Static Structural system and have the Modal Environment selected.
The Solution Method field must be set to Mode Superposition. To activate the Cyclic Mode Superposition option, turn on the Beta flag by selecting Yes in the Cyclic Mode Superposition field.
Note: Most Forced Response results require generated files. Set the Delete Unneeded Files option to No. This option is under Analysis Data Management in the Analysis Settings of the Harmonic system.
Leave the Solver Type within the Solver Controls set to . Only is supported. For more information, see Mode-Superposition Harmonic Cyclic Symmetry Analysis.