Hi Alexander, Thanks for getting in touch. This is basically an issue of correspondence between the surface mesh and the volume mesh, meaning that your surface was of too bad quality for the tetrahedral mesher. There could be many underlying reasons, the most common ones being poor quality and/or non-watertight CAD. If you can zip your CAD file along with your MCF file, I can try and have a look if there is anything obvious. Cheers, Julian Marcon Research Assistant (Early Stage Researcher) Department of Aeronautics / Aerodynamics Section Imperial College London, City and Guilds Building, Room 420 London SW7 2AZ Mob.: +44 (0)7449 121911<tel:+447449121911> From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> On Behalf Of A.P. Sent: 18 March 2018 04:16 To: nektar-users <nektar-users@imperial.ac.uk> Subject: [Nektar-users] Cannot find corresponding element face Hello, I ran NekMesh utility and recived the error message: "Cannot find corresponding element face for 2D element ..." What can I do in this situation? Alexander.