HI Mehak, Did anyone send you a response to this? Using 7 homogeneous modes is quite an usual number since it is not a binary number. Does it work if you use mode=4? Cheers, Spencer. On 4 Jan 2017, at 10:16, Mehak <mehak.n.oberoi@gmail.com<mailto:mehak.n.oberoi@gmail.com>> wrote: Dear all, I have generated a high order data for Quasi-3D: Homogeneous in z-direction (Number of homogeneous mode =8). Now i want to use the result as a initial condition for another simulation where i have (Number of homogeneous mode =7 or less). My solution is very smooth. The simulation is crashing with the segmentation fault error. EquationType: UnsteadyNavierStokes Spatial Dim.: 3 Max SEM Exp. Order: 6 Quasi-3D: Homogeneous in z-direction Expansion Dim.: 3 Num. Hom. Modes (z): 6 Projection Type: Continuous Galerkin Advection: explicit Diffusion: implicit Integration Type: IMEXOrder2 Any input from you will be very helpful. Thanks Mehak naina oberoi mehak.n.oberoi@gmail.com<mailto:mehak.n.oberoi@gmail.com> _______________________________________________ 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 McLaren Racing/Royal Academy of Engineering Research Chair, Professor of Computational Fluid Mechanics, Department of Aeronautics, Imperial College London South Kensington Campus London SW7 2AZ s.sherwin@imperial.ac.uk<mailto:s.sherwin@imperial.ac.uk> +44 (0) 20 759 45052