Dear Hongfu, you can just try to use the following command: FieldConvert filename.xml filename_eig_0.fld filename_eig_0.vtu in order to get a vtu file which can be then loaded into Paraview. Please, note that I have explicitly added the extension .fld to your original filename_eig_0 - this is to allow the postprocessing routine to avoid the error you may have encountered trying to convert it. Let me know if this works. Best regards, Gianmarco Gianmarco Mengaldo Department of Aeronautics and Mathematics Room 730/731, Huxley Building Imperial College London South Kensington Campus London SW7 2AZ M: +447462029290 On 10 Sep 2015, at 13:52, Hongfu Zhang <hongfu2233@gmail.com<mailto:hongfu2233@gmail.com>> wrote: Hi All, I want to computethe eigenmode of a period field using BiGlobal Floquet analysis. I have gotten the "filename_eig_0" like file, how to do post-processing with this kind of file? Thanks very much for any help! Best Regards! Hongfu _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users