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GMSH 4.4.1 msh file not working in OGS 6.2.1

Sir/Madam
Whenever I create a Mesh in GMSH 4.4.1 and import in the OGS 6.2.1. It always shows a message “Failed to load a GMSH mesh”. Please suggest how to rectify this issue.

Hi,
you can specify the the file format version when you export the mesh. It still has to be GMSH v.2 ASCII (cf. https://www.opengeosys.org/docs/tools/getting-started/first_steps/).

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How should I specify the file format version in this case? Looking forward to your reply.