Oracle Solution for Error ora-54509

ORA-54509: solid not attached to composite solid

What triggered the Error:

To connect solids in a composite solid geometry, at least one of the faces of a solid must be shared (fully or partially) with only another solid. However, at least one of the faces in this composite solid was not shared by exactly two solids only.

What should we do to fix it:

Ensure that at least one face in a composite solid is shared by exactly two solids.