Hi Ding, Fld2Tecplot is an old utility. Currently I would expect to be using FieldConvert regularizedliddriven.xml regularisedliddriven.fld regularizedliddriven.dat In the most recent version of master you can also directly produce a .plt file. Cheers, Spencer. On 16 Dec 2016, at 01:12, 丁老师 <ztdepyahoo@163.com<mailto:ztdepyahoo@163.com>> wrote: Dear Nektar group: ./Fld2Tecplot regularizedliddriven.xml regularizedliddriven.fld Fatal : Level 0 assertion violation EquationSystem 'VelocityCorrectionScheme' is not defined. Ensure equation name is correct and module is compiled. how to resolve this problem. Regards Your Sincerely Ding _______________________________________________ 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