Hi,dear friends.I'm now trying to solve a transient electromagnetic field problem using COMSOL Multiphysics.But when I build  the mesh,it shows :

Failed to generate mesh for domain.

- Domain: 7

Failed to insert point.

- x-coordinate: 2999.28

- y-coordinate: -19.7869

- z-coordinate: 0

An empty cavity was generated.

 And I also split the mesh from small to large order ,but it still shows errors.So how can I modify my model so as it can build the mesh well?

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