When I exported the file as .msh,it shows error like this: erroreriodic boundary entity ** is not specified correctly.The two periodic entities must be link meshed and specified on the same boundary entity.

what's the reason? Ana how to solve it? Thanks

Hi, you have to link the edges (or surfaces or volumes) mesh on which you want to apply periodic BC before meshing.

[Haniii]

Hi
I am Having the
WARN: boundary entity shadow ** does not contain any valid entity and is not written

I am also having this
Error: periodic boundary entity ** is not specified correctly.The two periodic entities must be link meshed and specified on the same boundary entity.
No entities were found for mesh export
Errors were found during export. Export file was not created.


what's the reason? And how to solve it?

Thank you very much