Error: Unable to successfully call PETSc function 'VecScatterCreate'.

[Evan Cummings]

Running a simulation with IPOpt, solver "ma97", at iterate 1060 - something, I get the error

...
  File "/home/pf4d/Documents/dolfin-adjoint/dolfin_adjoint/utils.py", line 65, in gather
    arr = vec.gather(numpy.arange(vec.size(), dtype='intc'))
RuntimeError:

*** -------------------------------------------------------------------------
*** DOLFIN encountered an error. If you are not able to resolve this issue
*** using the information listed below, you can ask for help at
***
***     [e-mail]
***
*** Remember to include the error message listed below and, if possible,
*** include a *minimal* running example to reproduce the error.
***
*** -------------------------------------------------------------------------
*** Error:   Unable to successfully call PETSc function 'VecScatterCreate'.
*** Reason:  PETSc error code is: 1.
*** Where:   This error was encountered inside /build/dolfin-W5yB8A/dolfin-1.6.0/dolfin/la/PETScVector.cpp.
*** Process: 14
***
*** DOLFIN version: 1.6.0
*** Git changeset:  unknown
*** -------------------------------------------------------------------------

dolfin and dolfin_adjoint version 1.6... I do not have a minimal example, just looking for first guesses here.

[Simon Funke]

Did you get any further with this?

According to http://www.mcs.anl.gov/petsc/petsc-dev/include/petscerror.h.html this seems to be an unhandled PETSc problem.

[Evan Cummings]

Unfortunately, no. I just restart the solver and push through eventually.

[Simon Funke]

Sorry, but this is hard to debug without being able to reproduce the issue. Maybe your array contains nans after some while?