Hi, I successfully generated a hexahedral mesh using Gmsh (the python file is attached here). I then tried to use the mesh in Firedrake. Please find below the code: from firedrake import * mesh=Mesh('pipev1.msh') I get a KeyError:6 from ufl.Cell module. Kindly help me. Thanks -- Abhishek Venketeswaran NETL Research Associate - ORISE National Energy Technology Laboratory Department of Energy abhishek.venketeswaran@netl.doe.gov Work: 412-386-4833 Mobile: 716-507-7890 www.netl.doe.gov<http://www.netl.doe.gov> [cid:8e261aa0-bff1-4ab3-b5c3-1e789205f14b]