# Error while runing simulation **URL:** \ **Category:** Uncategorised\ **Created:** [3 September 2024 17:14 UTC](https://pyfr.discourse.group/t/error-while-runing-simulation/1158 "2024-09-03T17:14:06Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Amirshau](https://avatars.discourse-cdn.com/v4/letter/a/c89c15/32.png) [@Amirshau](https://pyfr.discourse.group/u/Amirshau)\ **Post date:** [3 September 2024 17:14 UTC](https://pyfr.discourse.group/t/error-while-runing-simulation/1158/1 "2024-09-03T17:14:06Z")
Hi everyone, I’m trying to run a simulation on the GPU cluster, and I’m getting this error: ## Traceback (most recent call last): File “/usr/local/bin/pyfr”, line 33, in sys.exit(load\_entry\_point(‘pyfr==2.0.1’, ‘console\_scripts’, ‘pyfr’)()) File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/ **main**.py”, line 124, in main File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/ **main**.py”, line 258, in process\_run File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/ **main**.py”, line 254, in \_process\_common File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/base.py”, line 141, in run File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/dual/phys/controllers.py”, line 43, in advance\_to File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/dual/phys/steppers.py”, line 28, in step File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/dual/pseudo/multip.py”, line 304, in pseudo\_advance File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/dual/pseudo/pseudocontrollers.py”, line 153, in pseudo\_advance File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/dual/pseudo/pseudosteppers.py”, line 244, in step File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/dual/pseudo/multip.py”, line 102, in \_rhs\_with\_dts File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/integrators/dual/pseudo/pseudosteppers.py”, line 37, in \_rhs\_with\_dts File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/solvers/base/system.py”, line 270, in rhs File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/util.py”, line 38, in newmeth File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/solvers/baseadvecdiff/system.py”, line 132, in \_rhs\_graphs File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/solvers/base/system.py”, line 334, in \_group File “/usr/local/lib/python3.10/dist-packages/pyfr-2.0.1-py3.10.egg/pyfr/backends/base/types.py”, line 388, in group ValueError: Kernel grouping violates dependencies Traceback (most recent call last): File “/usr/local/bin/pyfr”, line 33, in MPI\_ABORT was invoked on rank 4 in communicator MPI\_COMM\_WORLD with errorcode 1. NOTE: invoking MPI\_ABORT causes Open MPI to kill all MPI processes. You may or may not see output from other processes, depending on exactly when Open MPI kills them. with the following ini file content: [backend] precision = double rank-allocator = linear [backend-cuda] device-id = local-rank ;mpi-type = cuda-aware mpi-type = standard [constants] ac-zeta = 0.4 gamma = 1.4 Uin = 1 Vin = 0 Win = 0 Pc = 1.013 Pr = 0.72 nu = 0.000015 h = 0.1 k = 0.41 Utau = 0.93 d = 0.063 z0 = 0.01 [solver] system = ac-navier-stokes order = 3 anti-alias = flux, surf-flux [solver-time-integrator] formulation = dual scheme = backward-euler pseudo-scheme = rk45 controller = none tstart = 0.0 tend = 24 dt = 0.00016 atol = 0.00001 rtol = 0.00001 pseudo-dt = 1e-5 pseudo-niters-max = 20 pseudo-niters-min = 3 pseudo-resid-tol = 1e-4 ; pseudo-resid-tol-p = 3e-3 pseudo-resid-norm = l2 pseudo-controller = local-pi safety-fact = 0.8 min-fact = 0.98 max-fact = 1.01 pseudo-dt-max-mult = 2.5 [solver-dual-time-integrator-multip] pseudo-dt-fact = 1.75 ; cycle = [(4,1), (3, 1), (2, 1), (1, 1), (0, 3), (1, 1), (2, 1), (3, 1), (4,3)] cycle = [(3, 1), (2, 1), (1, 1), (0, 3), (1, 1), (2, 1), (3, 3)] [solver-interfaces] riemann-solver = rusanov ldg-beta = 0.5 ldg-tau = 0.1 [solver-interfaces-line] flux-pts = gauss-legendre quad-deg = 9 quad-pts = gauss-legendre ;[solver-interfaces-line-mg-p2] ;flux-pts = gauss-legendre ;quad-deg = 7 ;quad-pts = gauss-legendre ;[solver-interfaces-line-mg-p1] ;flux-pts = gauss-legendre ;quad-deg = 5 ;quad-pts = gauss-legendre ;[solver-interfaces-line-mg-p0] ;flux-pts = gauss-legendre ;quad-deg = 3 ;quad-pts = gauss-legendre [solver-elements-tri] soln-pts = williams-shunn quad-deg = 9 quad-pts = williams-shunn ;[solver-elements-tri-mg-p2] ;soln-pts = williams-shunn ;quad-deg = 7 ;quad-pts = williams-shunn ;[solver-elements-tri-mg-p1] ;soln-pts = williams-shunn ;quad-deg = 5 ;quad-pts = williams-shunn ;[solver-elements-tri-mg-p0] ;soln-pts = williams-shunn ;quad-deg = 3 ;quad-pts = williams-shunn [solver-elements-quad] soln-pts = gauss-legendre quad-deg = 9 quad-pts = gauss-legendre ;[solver-elements-quad-mg-p2] ;soln-pts = gauss-legendre ;quad-deg = 7 ;quad-pts = gauss-legendre ;[solver-elements-quad-mg-p1] ;soln-pts = gauss-legendre ;quad-deg = 5 ;quad-pts = gauss-legendre ;[solver-elements-quad-mg-p0] ;soln-pts = gauss-legendre ;quad-deg = 3 ;quad-pts = gauss-legendre [solver-elements-hex] soln-pts = gauss-legendre quad-deg = 9 quad-pts = gauss-legendre ;[solver-elements-hex-mg-p2] ;soln-pts = gauss-legendre ;quad-deg = 7 ;quad-pts = gauss-legendre ;[solver-elements-hex-mg-p1] ;soln-pts = gauss-legendre ;quad-deg = 5 ;quad-pts = gauss-legendre ;[solver-elements-hex-mg-p0] ;soln-pts = gauss-legendre ;quad-deg = 3 ;quad-pts = gauss-legendre [solver-elements-pri] soln-pts = williams-shunn~gauss-legendre quad-deg = 9 quad-pts = williams-shunn~gauss-legendre ;[solver-elements-pri-mg-p2] ;soln-pts = williams-shunn~gauss-legendre ;quad-deg = 7 ;quad-pts = williams-shunn~gauss-legendre ;[solver-elements-pri-mg-p1] ;soln-pts = williams-shunn~gauss-legendre ;quad-deg = 5 ;quad-pts = williams-shunn~gauss-legendre ;[solver-elements-pri-mg-p0] ;soln-pts = williams-shunn~gauss-legendre ;quad-deg = 3 ;quad-pts = williams-shunn~gauss-legendre [solver-interfaces-tri] flux-pts = williams-shunn quad-deg = 9 quad-pts = williams-shunn ;[solver-interfaces-tri-mg-p2] ;flux-pts = williams-shunn ;quad-deg = 7 ;quad-pts = williams-shunn ;[solver-interfaces-tri-mg-p1] ;flux-pts = williams-shunn ;quad-deg = 5 ;quad-pts = williams-shunn ;[solver-interfaces-tri-mg-p0] ;flux-pts = williams-shunn ;quad-deg = 3 ;quad-pts = williams-shunn [solver-interfaces-quad] flux-pts = gauss-legendre quad-deg = 9 quad-pts = gauss-legendre ;[solver-interfaces-quad-mg-p2] ;flux-pts = gauss-legendre ;quad-deg = 7 ;quad-pts = gauss-legendre ;[solver-interfaces-quad-mg-p1] ;flux-pts = gauss-legendre ;quad-deg = 5 ;quad-pts = gauss-legendre ;[solver-interfaces-quad-mg-p0] ;flux-pts = gauss-legendre ;quad-deg = 3 ;quad-pts = gauss-legendre [soln-plugin-nancheck] nsteps = 50 [soln-plugin-writer] tstart = 12.0 dt-out = 0.5 basedir = /home/amir.shaulov/ ; basedir = . basename = Urban\_AC-{t:.2f} [solver-plugin-turbulence] avg-rho = 1.185 avg-u = 1.0 avg-mach = 0.02 turbulence-intensity = 8 turbulence-length-scale = 0.002 sigma = 0.7 centre = (-0.4, 0.0, 0.06) y-dim = 0.8 z-dim = 0.12 rot-axis = (0, 0, 1) rot-angle = 0.0 [soln-ics] rho=1.185 u = 1.0 v = 0.0 w = 0.0 p = Pc [soln-bcs-walls] type = no-slp-wall u = 0 v = 0 w = 0 [soln-bcs-Inlet] type = ac-char-riem-inv ac-zeta = 5 rho=1.185 p = Pc u = (Utau/k) \* 2.303\*log((z-d)/(z0)) v = Vin w = Win [soln-bcs-inlet] type = ac-char-riem-inv ac-zeta = 5 rho=1.185 p = Pc u = (Utau/k) \* 2.303\*log((z-d)/(z0)) v = Vin w = Win [soln-bcs-Outlet] type = ac-char-riem-inv ac-zeta = 5 rho=1.185 p = Pc u = Uin v = Vin w = Win [soln-bcs-outlet] type = ac-char-riem-inv ac-zeta = 5 rho=1.185 p = Pc u = Uin v = Vin w = Win [soln-bcs-farfield] type = slp-wall ac-zeta = 5 rho=1.185 p = Pc Please advice how to overcome this issue. Amir ---
**Author:** ![p.vincent](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/p.vincent/32/225_2.png) [@p.vincent](https://pyfr.discourse.group/u/p.vincent)\ **Post date:** [3 September 2024 17:31 UTC](https://pyfr.discourse.group/t/error-while-runing-simulation/1158/2 "2024-09-03T17:31:38Z")
I think updating to v2.0.3 should fix the issue. Regards Peter