# RuntimeError: No partitioners available **URL:** \ **Category:** Errors\ **Tags:** partition\ **Created:** [15 March 2024 00:58 UTC](https://pyfr.discourse.group/t/runtimeerror-no-partitioners-available/1060 "2024-03-15T00:58:24Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jung9053](https://avatars.discourse-cdn.com/v4/letter/j/f17d59/32.png) [@jung9053](https://pyfr.discourse.group/u/jung9053)\ **Post date:** [15 March 2024 00:58 UTC](https://pyfr.discourse.group/t/runtimeerror-no-partitioners-available/1060/1 "2024-03-15T00:58:24Z")
Hello, I was able to run single mesh cases using PyFR and now I am trying to follow the example " 2D Euler Vortex" case for partitioning case. I’ve installed METIS from below link and set path “PYFR\_METIS\_LIBRARY\_PATH=”. > **[GitHub - KarypisLab/METIS: METIS - Serial Graph Partitioning and...](https://github.com/KarypisLab/METIS)** > > METIS - Serial Graph Partitioning and Fill-reducing Matrix Ordering - KarypisLab/METIS But, I got the following error after command for grid partition as shown below. Please let me know how I can fix this… Thanks! ```auto $ pyfr partition 2 euler-vortex.pyfrm . Traceback (most recent call last): File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/bin/pyfr", line 8, in sys.exit(main()) ^^^^^^ File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 124, in main args.process(args) File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 187, in process_partition raise RuntimeError('No partitioners available') ``` ---
**Author:** ![fdw](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@fdw](https://pyfr.discourse.group/u/fdw)\ **Post date:** [15 March 2024 13:32 UTC](https://pyfr.discourse.group/t/runtimeerror-no-partitioners-available/1060/2 "2024-03-15T13:32:15Z")
Please apply: > and recompile METIS. Regards, Freddie. ---
**Author:** ![jung9053](https://avatars.discourse-cdn.com/v4/letter/j/f17d59/32.png) [@jung9053](https://pyfr.discourse.group/u/jung9053)\ **Post date:** [18 March 2024 06:16 UTC](https://pyfr.discourse.group/t/runtimeerror-no-partitioners-available/1060/3 "2024-03-18T06:16:12Z")
Thanks! Now, the partitioning works. For parallel computing, I’ve install gcc 13.1.0 and the latest version of “libxsmm”. path also included as `PYFR_XSMM_LIBRARY_PATH=/path/to/libxsmm.so` But for the same example case, I got the following error after command for parallel computing. `mpiexec -n 2 pyfr -p run -b cuda euler-vortex.pyfrm euler-vortex.ini` Please let me know how I can fix this… Thanks! ```auto Traceback (most recent call last): File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/bin/pyfr", line 8, in sys.exit(main()) ^^^^^^ File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 124, in main args.process(args) File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 258, in process_run _process_common( File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 240, in _process_common rallocs = get_rank_allocation(mesh, cfg) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/rank_allocator.py", line 12, in get_rank_allocation return subclass_where(BaseRankAllocator, name=name)(mesh, cfg) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/rank_allocator.py", line 29, in __init__ raise RuntimeError(f'Mesh has {nparts} partitions but running ' RuntimeError: Mesh has 2 partitions but running with 1 MPI ranks Traceback (most recent call last): File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/bin/pyfr", line 8, in sys.exit(main()) ^^^^^^ File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 124, in main args.process(args) File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 258, in process_run _process_common( File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/ __main__.py", line 240, in _process_common rallocs = get_rank_allocation(mesh, cfg) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/rank_allocator.py", line 12, in get_rank_allocation return subclass_where(BaseRankAllocator, name=name)(mesh, cfg) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/yongsu/Research/CFD/PyFR/libxsmm/pyfr-venv/lib/python3.11/site-packages/pyfr/rank_allocator.py", line 29, in __init__ raise RuntimeError(f'Mesh has {nparts} partitions but running ' ``` ---
**Author:** ![fdw](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@fdw](https://pyfr.discourse.group/u/fdw)\ **Post date:** [18 March 2024 10:48 UTC](https://pyfr.discourse.group/t/runtimeerror-no-partitioners-available/1060/4 "2024-03-18T10:48:44Z")
This is likely an `mpi4py` problem. Please run `mpiexec -np 3 python -c 'from mpi4py import MPI; print(MPI.COMM_WORLD.rank)'`. Regards, Freddie. ---
**Author:** ![jung9053](https://avatars.discourse-cdn.com/v4/letter/j/f17d59/32.png) [@jung9053](https://pyfr.discourse.group/u/jung9053)\ **Post date:** [20 March 2024 05:14 UTC](https://pyfr.discourse.group/t/runtimeerror-no-partitioners-available/1060/5 "2024-03-20T05:14:30Z")
problem solved! thank you!