******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Hi, I am trying to convert a simple mesh made in Gmsh (cyl.msh) to Nektar++ usable format (.xml). I can view the mesh in Gmsh. NekMesh gives the following error when I try to convert: NekMesh -v cyl.msh out.xml [InputGmsh] Reading Gmsh file: 'cyl.msh' [InputGmsh] Finished reading mesh. [InputGmsh] - Element dimension : 0 [InputGmsh] - Space dimension : 2 [InputGmsh] - No. of nodes : 0 [InputGmsh] - No. of 0D elements : 0 [InputGmsh] - No. of boundary elements : 0 [InputGmsh] - Elapsed time: 0.0542657s. [OutputNekpp] Writing Nektar++ file 'out.xml' Fatal : Level 0 assertion violation Unable to read composite index range: terminate called after throwing an instance of 'Nektar::ErrorUtil::NekError' what(): Level 0 assertion violation Unable to read composite index range: Aborted Can you help me with this problem? With kind regards, Ilteber -- İlteber R. Özdemir