******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Hello all! I'm new to Nektar and have been trying to solve for incompressible flow using the MPI parallelisation feature. Problem: I run the command 'mpirun -np 4 $<path to solver>/IncNavierStokesSolver file.xml' and it does not work at all. No error no solver initialization. On running the same command with one modification 'mpirun -np 4 *\*$<path to solver>/IncNavierStokesSolver file.xml' the following error is encountered: -------------------------------------------------------------------------- mpirun was unable to launch the specified application as it could not access or execute an executable: Executable: \<path to solver>/IncNavierStokesSolver Node:XYZ while attempting to start process rank 0. -------------------------------------------------------------------------- 4 total processes failed to start Background: I am certain the server I work on has MPI enabled on it. When configuring the nektar package I switch the NEKTAR_USE_MPI to ON, and leave everything else as is, then install the make. I am also certain the file I'm trying to solve parallely works serially. I am not even being able to parallely execute standard files like Cyl.xml in the Examples of IncNavierStokesSovler. Following is my ccmake configuration list for reference. What am I doing wrong? Kindly advise. Thank you! Regards, Srihari Menon University of Pennsylvania Configuration list: CMAKE_BUILD_TYPE Release CMAKE_INSTALL_PREFIX /home1/s/srimenon/nektar++-4.4.1/build/dist CONVERT /usr/bin/convert NEKTAR_BUILD_DEMOS ON NEKTAR_BUILD_DOC OFF NEKTAR_BUILD_LIBRARY ON NEKTAR_BUILD_SOLVERS ON NEKTAR_BUILD_TESTS ON NEKTAR_BUILD_TIMINGS OFF NEKTAR_BUILD_UNIT_TESTS ON NEKTAR_BUILD_UTILITIES ON NEKTAR_SOLVER_ADR ON NEKTAR_SOLVER_APE ON NEKTAR_SOLVER_CARDIAC_EP ON NEKTAR_SOLVER_COMPRESSIBLE_FLO ON NEKTAR_SOLVER_DIFFUSION ON NEKTAR_SOLVER_ELASTICITY ON NEKTAR_SOLVER_INCNAVIERSTOKES ON NEKTAR_SOLVER_PULSEWAVE ON NEKTAR_SOLVER_SHALLOW_WATER ON NEKTAR_TEST_ALL OFF NEKTAR_TEST_FORCEMPIEXEC OFF NEKTAR_TEST_USE_HOSTFILE OFF NEKTAR_USE_ACML OFF NEKTAR_USE_ARPACK OFF NEKTAR_USE_BLAS_LAPACK ON NEKTAR_USE_CCM OFF NEKTAR_USE_FFTW OFF NEKTAR_USE_HDF5 OFF NEKTAR_USE_MESHGEN OFF NEKTAR_USE_MKL OFF NEKTAR_USE_MPI ON NEKTAR_USE_OPENBLAS ON NEKTAR_USE_PETSC OFF NEKTAR_USE_SCOTCH OFF NEKTAR_USE_SMV OFF NEKTAR_USE_VTK OFF THIRDPARTY_BUILD_BLAS_LAPACK ON THIRDPARTY_BUILD_BOOST ON THIRDPARTY_BUILD_GSMPI ON THIRDPARTY_BUILD_LOKI ON