Dear Vishal, I do not quite recall but it may be necessary to define the expansions for composites of different shape independently. So please try: <E COMPOSITE=“C[1]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> <E COMPOSITE=“C[10]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> <E COMPOSITE="C[11]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> Possibly it is expecting to have a pyramid collection within a tetrahedral expansion and so this is why you see this message. If this does not work can you send the xml file along. Thanks, Spencer. On 26 Nov 2018, at 11:45, Vishal Saini <vishal.saini.nitj@gmail.com<mailto:vishal.saini.nitj@gmail.com>> wrote: Hi all, I've imported a mesh from gmsh that contains a layer of pyramids for transitioning between hexes and tets using: NekMesh JICF_NektP2_2comp.msh JICF_NektP2_2comp.xml Output: Multiple elements in composite detected; remapped: - Tag 1 => 11 (Tetrahedron), 10 (Pyramid), 1 (Hexahedron) No problem on NekMesh level. Defining my expansion as: <E COMPOSITE="C[1,10,11]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> when I run (Nektar++ v 4.4.1) using: mpirun -npernode 28 -np 56 IncNavierStokesSolver -v JICF_NektP2_2comp_xml conditions_JICF_2D.xml (using prepartitioned mesh). I get the following "note": Collection Implemenation for Tetrahedron ( 3 3 3 ) for ngeoms = 24960 Note: Implementation does not exist: Pyramid, BwdTrans, SumFac, Modal Note: Implementation does not exist: Pyramid, IProductWRTBase, SumFac, Modal Note: Implementation does not exist: Pyramid, IProductWRTDerivBase, SumFac, Modal Note: Implementation does not exist: Pyramid, PhysDeriv, SumFac, Modal Note: Implementation does not exist: Pyramid, BwdTrans, SumFac, Modal Note: Implementation does not exist: Pyramid, IProductWRTBase, SumFac, Modal Note: Implementation does not exist: Pyramid, IProductWRTDerivBase, SumFac, Modal Note: Implementation does not exist: Pyramid, PhysDeriv, SumFac, Modal What does it mean? How can I fix it? Do Pyramids need to be treated in a somewhat different way? BR, Vishal --- Vishal SAINI _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users Spencer Sherwin FREng, FRAeS Head, Aerodynamics, Director of Research Computing Service, Professor of Computational Fluid Mechanics, Department of Aeronautics, s.sherwin@imperial.ac.uk<mailto:s.sherwin@imperial.ac.uk> South Kensington Campus, Phone: +44 (0)20 7594 5052 Imperial College London, Fax: +44 (0)20 7594 1974 London, SW7 2AZ, UK http://www.imperial.ac.uk/people/s.sherwin/