[ACGray]

I've recently installed SU2 4.2 in parallel in Kubuntu and I'm using MPICH. Everything in the installation seemed to go fine but I'm having a couple of problems:

1 - When I run models with parallel_computation.py the code gets output multiple times, according to the FAQ's on the SU2 site this means that my code hasn't compiled properly

2 - When I try to run shape_optimization.py in parallel it fails just before attempting the second design iteration, in the command line I get this:
Traceback (most recent call last):
File "/home/ali/SU2-install/bin/shape_optimization.py", line 155, in <module>
main()
File "/home/ali/SU2-install/bin/shape_optimization.py", line 99, in main
options.quiet )
File "/home/ali/SU2-install/bin/shape_optimization.py", line 138, in shape_optimization
SU2.opt.SLSQP(project,x0,xb,its,accu)
File "/home/ali/SU2-install/bin/SU2/opt/scipy_tools.py", line 133, in scipy_slsqp
epsilon = eps )
File "/usr/lib/python2.7/dist-packages/scipy/optimize/slsqp.py", line 206, in fmin_slsqp
constraints=cons, **opts)
File "/usr/lib/python2.7/dist-packages/scipy/optimize/slsqp.py", line 363, in _minimize_slsqp
fx = func(x)
File "/usr/lib/python2.7/dist-packages/scipy/optimize/optimize.py", line 289, in function_wrapper
return function(*(wrapper_args + args))
File "/home/ali/SU2-install/bin/SU2/opt/scipy_tools.py", line 149, in obj_f
obj = project.obj_f(x)
File "/home/ali/SU2-install/bin/SU2/opt/project.py", line 213, in obj_f
return self._eval(konfig, func,dvs)
File "/home/ali/SU2-install/bin/SU2/opt/project.py", line 182, in _eval
vals = design._eval(func,*args)
File "/home/ali/SU2-install/bin/SU2/eval/design.py", line 142, in _eval
vals = eval_func(*inputs)
File "/home/ali/SU2-install/bin/SU2/eval/design.py", line 240, in obj_f
func = su2func(this_obj,config,state)
File "/home/ali/SU2-install/bin/SU2/eval/functions.py", line 85, in function
aerodynamics( config, state )
File "/home/ali/SU2-install/bin/SU2/eval/functions.py", line 224, in aerodynamics
info = su2run.direct(config)
File "/home/ali/SU2-install/bin/SU2/run/direct.py", line 81, in direct
SU2_CFD(konfig)
File "/home/ali/SU2-install/bin/SU2/run/interface.py", line 115, in CFD
run_command( the_Command )
File "/home/ali/SU2-install/bin/SU2/run/interface.py", line 295, in run_command
raise exception , message
RuntimeError: Path = /home/ali/SU2/TestCases/optimization_euler/steady_naca0012/DESIGNS/DSN_002/DIRECT/,
Command = mpirun -n 4 /home/ali/SU2-install/bin/SU2_CFD config_CFD.cfg
SU2 process returned error '139'

and in the log_direct.out file, this is the final line:
mpirun noticed that process rank 2 with PID 11088 on node Steve exited on signal 11 (Segmentation fault).

I'm guessing these 2 issues are linked but I'm a complete newbie to Linux and coding in general (bar Matlab and a tiny bit of Python). Can anyone explain what the problem is and how I can go about fixing it in layman's terms

Thanks in advance

Ali

[hlk]

I recommend both trying the shape optimization in serial (1 processor) and recompiling (see instructions: https://github.com/su2code/SU2/wiki/Parallel-Build), making sure that you have all the prerequisites installed and that you are not accidentally calling a previously built executable.

For the shape optimization output, if you look in the subfolders created (DESIGNS/DSN_001/DIRECT, .../DEFORM, etc), there are several log files created. These can be helpful in determining where, and why, the simulation failed. For example, if the first flow solution diverged, you would find that information near the end of the DESIGNS/DSN_001/DIRECT/log_Direct.out file. This could be happening in your log file, just further back in the file before the extra errors printed out by the parallel system - if there are no other errors prior to the one you mentioned, running in serial instead could help narrow down the issue although it would be slower.

[ACGray]

Hey Heather, thanks for the reply!

Forgot to post an update but I actually solved this a few days after posting. I checked the log files and sure enough one of the MPI calls for part of the optimisation process was failing and aborting the whole thing. Turns out I had both openMPI and MPICH installed and had referenced the wrong one during the SU2 installation. Uninstalling openMPI and reinstalling MPICH and SU2 solved all my problems.

Cheers!

Ali