UnicodeDecodeError: 'utf-8' codec can't decode byte 0xdf in position 16: invalid continuation byte

[uttamcadambi07]

Hi,

I am running IPOPT with pyOptSparse. Version details:
IPOPT - v3.13.3
pyOptSparse - v2.8.1

here are the modules loaded:

  1) git/2.24.1               3) libfabric/1.7.0   5) boost/1.70.0   7) python/3.7.3           9) intel-mkl/2018.1.163
  2) intel-compilers/18.0.3   4) gcc/6.4.0         6) petsc/3.18.2   8) intel-mpi/2018.3.222

I compiled IPOPT with mumps. I did not configure mumps with metis.

When I run my test case that uses IPOPT, I get this error

 File "runScript_v2.py", line 174, in <module>
    sol = opt(optProb, sens=optFuncs.calcObjFuncSens, storeHistory=histFile)
  File "/mainfs/scratch/ucp1n22/DAFoam_v3/repos/pyoptsparse-2.8.1/pyoptsparse/pyIPOPT/pyIPOPT.py", line 250, in __call__
    self._waitLoop()
  File "/mainfs/scratch/ucp1n22/DAFoam_v3/repos/pyoptsparse-2.8.1/pyoptsparse/pyOpt_optimizer.py", line 689, in _waitLoop
    info = self.optProb.comm.bcast(info, root=0)
  File "mpi4py/MPI/Comm.pyx", line 1569, in mpi4py.MPI.Comm.bcast
  File "mpi4py/MPI/msgpickle.pxi", line 732, in mpi4py.MPI.PyMPI_bcast
  File "mpi4py/MPI/msgpickle.pxi", line 152, in mpi4py.MPI.pickle_load
  File "mpi4py/MPI/msgpickle.pxi", line 141, in mpi4py.MPI.cloads
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xdf in position 16: invalid continuation byte

Is this a relevant platform for this problem? Or would I be better off posting in IPOP forum? Please advice.

[ewu63]

You should check to make sure that your mpi4py works as expected. Also this Python version is a bit old but I don't think that should matter here. What's your numpy version?