[petsc-users] printing from some processors to a file

[Randall Mackie]

I am trying to print a character string to a file from one or more
processors in a communicator. I thought that I could do this using
PetscViewerASCIISynchronizedPrintf, but it prints to the screen instead of
to the file opened as a viewer. The attached simple program illustrates the
issue. If I remove the (if rank == 1) and therefore call
PetscViewerASCIISynchronizedPrintf from every process, it works as
expected. If called from only 1 process, it prints to the screen. I
thought, from the documentation, that it was not collective, but maybe I am
not understanding it's usage.


Randy M.
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