Problem converting Pre-mesh to MultiBlock
 

Hello everyone, Currently having an issue on the mesh I created on ICEM.

The geometry itself is half a wing in the C-domain. I follow the usual ICEM routine and making it to unstructured and simulating it without any problem. When I want to make it to multiblock mesh from pre-mesh, it seems having an issue with projecting the surface mesh. :confused:
I'm quite unfamiliar with multiblock and CGNS output, Looking forward for any suggestion and recommendation.

Best Regards
Lucky