6.5.3 Repairing Duplicate Shadow Nodes

If the mesh check report includes a warning message such as

WARNING: node on face thread 2 has multiple shadows.

it indicates the existence of duplicate shadow nodes. This error occurs only in meshes with periodic-type walls. You can repair such a mesh using the following text command:

mesh $\rightarrow$ modify-zones $\rightarrow$ repair-periodic

If the interface is rotational periodic, you will be prompted for the rotation angle.