Have you tried running some hello world example ? what happens if you put
mpirun -np 64 hostname in your pbs script ? best praveen On Sun, Jan 18, 2026 at 12:23 PM ME20D503 NEWTON <[email protected]> wrote: > Hello deal.II community > > I am working with the deal.II finite element library and recently > transitioned from workstation based simulations to an HPC environment. My > simulations are 3D problems with a large number of degrees of freedom, so I > am using MPI parallelisation. > > I am facing an issue while running an MPI-based deal.II application on our > institute’s HPC cluster, and I would appreciate your guidance. > > *Software details:* > > - > > deal.II version: 9.7.0 > - > > deal.II module: dealii_9.7.0_intel > - > > MPI launcher available on system: /usr/bin/mpiexec (OpenMPI 4.1.5) > - > > Intel oneAPI environment is sourced in the job script > - > > Scheduler: PBS Pro (version 23.06.06) > > *HPC node configuration (from pbsnodes):* > > - > > node1: 32 CPUs 125 GB RAM > - > > node2: 32 CPUs, 126 GB RAM > - > > node3: 32 CPU 504 GB RAM > - > > node4: 32 CPUs, 504 GB RAM > > *Observed behaviour:* > > - > > The code runs correctly on any single node. > - > > The code runs correctly when using node3 + node4 together. > - > > The code fails when using node1 + node2 together, or other mixed node > combinations. > > *PBS job script and **Error file** attached for your reference* > > > *Question:* > Does this behaviour indicate a known issue related to MPI launcher usage, > node allocation, or deal.II configuration on PBS-based clusters? Any > guidance on how such node-combination-dependent failures should be > diagnosed from the deal.II side would be very helpful. > > Thank you for your time and support. > > Best regards, > Newton > > -- > The deal.II project is located at http://www.dealii.org/ > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > --- > You received this message because you are subscribed to the Google Groups > "deal.II User Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/dealii/7ffb3122-ac5a-4218-9645-1cdb8a9ef91an%40googlegroups.com > <https://groups.google.com/d/msgid/dealii/7ffb3122-ac5a-4218-9645-1cdb8a9ef91an%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/dealii/CAEvUdMLVGmb7JRRYmRncQPc6_McqTz2ahSLAXJPAvQL7YWXFLA%40mail.gmail.com.
