Hello all, I am wondering if there is any interest or need for the mesh converter tool to write to the most up to date version of the .msh file format, which is currently version 4/4.1. I know that gmsh_io can read from versions 2.0 up through 4.0 at least, but only writes to version 2.0 during output. I have found that there is a specific gap here in the capabilities of conversion tools from EXODUS II to the current Gmsh .msh file version, and stumbled upon this while trying to wrangle together reactor meshes for my group's radiation code. I'll probably end up writing a direct converter from EXODUS to our file format, but as it stands I think there's a gap in mesh conversion capabilities that libMesh would be apt to address if implemented.

One 'workaround' I've found is using libMesh to convert from EXODUS to .msh version 2.0, and then using the Gmsh editor to export it as version 4.1 - but I don't think this plays nicely between .msh files in terms of the physical volumes and volumes, and does not do a good job of preserving information from EXODUS like subdomains from MOOSE. Physical groups in Gmsh are important for mapping elements to materials, in our case. Thoughts on writing to the updated .msh version?