[petsc-users] use of undeclared identifier PetscViewerHDF5Open - in Petsc 3.12

[Armando Coco]

Hello,

I am trying to compile a petsc program that calls PetscViewerHDF5Open.
I have added #include <petscviewerhdf5.h> in the header, but the
compilation fails with error:
use of undeclared identifier PetscViewerHDF5Open

I have asked a colleague to run the same program in a newer version 3.14 or
3.15 and everything seems to work properly. Does it mean that I have to
update my petsc version necessarily?

Many Thanks
Armando
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