Hello Neks, I am trying to refine my current mesh using Prenek and interpolating my current data from the current grid to the refined one. I kept following the instructions for the function g2gi() and was able to run makenek successful. But using nek or nekmpi keeps giving me following error messages. For nek: /----------------------------------------------------------\\ | _ __ ______ __ __ ______ ____ ____ ____ | | / | / // ____// //_/ / ____/ / __ \\ / __ \\ / __ \\ | | / |/ // __/ / ,< /___ \\ / / / // / / // / / / | | / /| // /___ / /| | ____/ / / /_/ // /_/ // /_/ / | | /_/ |_//_____//_/ |_|/_____/ \\____/ \\____/ \\____/ | | | |----------------------------------------------------------| | | | NEK5000: Open Source Spectral Element Solver | | COPYRIGHT (c) 2008-2010 UCHICAGO ARGONNE, LLC | | Version: 1.0rc1 / SVN r1061 | | Web: http://nek5000.mcs.anl.gov | | | \\----------------------------------------------------------/ Number of processors: 1 REAL wdsize : 8 INTEGER wdsize : 4 [satyajit-All-Series:17818] *** An error occurred in MPI_Bcast [satyajit-All-Series:17818] *** on communicator MPI COMMUNICATOR 3 DUP FROM 0 [satyajit-All-Series:17818] *** MPI_ERR_TYPE: invalid datatype [satyajit-All-Series:17818] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort real 0m0.029s user 0m0.005s sys 0m0.010s and for nekmpi: /----------------------------------------------------------\\ | _ __ ______ __ __ ______ ____ ____ ____ | | / | / // ____// //_/ / ____/ / __ \\ / __ \\ / __ \\ | | / |/ // __/ / ,< /___ \\ / / / // / / // / / / | | / /| // /___ / /| | ____/ / / /_/ // /_/ // /_/ / | | /_/ |_//_____//_/ |_|/_____/ \\____/ \\____/ \\____/ | | | |----------------------------------------------------------| | | | NEK5000: Open Source Spectral Element Solver | | COPYRIGHT (c) 2008-2010 UCHICAGO ARGONNE, LLC | | Version: 1.0rc1 / SVN r1061 | | Web: http://nek5000.mcs.anl.gov | | | \\----------------------------------------------------------/ Number of processors: 2 REAL wdsize : 8 INTEGER wdsize : 4 ERROR (proc 0000, /home/michaelr/nek5_svn/trunk/nek/jl/fcrystal.c:94): comm_init_check: passed P=2, but not compiled with -DMPI call exitt: dying ... ERROR (proc 0000, /home/michaelr/nek5_svn/trunk/nek/jl/fcrystal.c:94): comm_init_check: passed P=2, but not compiled with -DMPI backtrace(): obtained 11 stack frames. ./nek5000() [0x4e6b0a] ./nek5000() [0x5a55e9] ./nek5000() [0x5dfe25] ./nek5000() [0x5dfeba] ./nek5000() [0x5e0053] ./nek5000() [0x5a7b96] ./nek5000() [0x5a8a28] ./nek5000() [0x402c5f] ./nek5000() [0x4022d4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f95d20b3ec5] ./nek5000() [0x402319] total elapsed time : 1.46547E+09 sec total solver time incl. I/O : 0.00000E+00 sec time/timestep : 0.00000E+00 sec CPU seconds/timestep/gridpt : 0.00000E+00 sec Any suggestions? Br, Michael