If the CYCLIC command's default automatic detection capability accepts your model for cyclic analysis, the program will have already verified the following two essential conditions for a cyclic analysis:
When your model rotates by the cyclic angle about the local Z axis of the cyclic coordinate system, the edges identified as "low" occupy the same space as those identified by "high" prior to the rotation.
The cyclic angle divides evenly into 360°.
If you specify edge components and cyclic quantities manually, you must verify the two conditions yourself.