[vtkusers] vtkPCosmoReader

[David E DeMarle]

You definitely need to call Update, as nothing in VTK provides any
data until Update (or Render) tells them to do so. You might try
setting overlap to 0.

But we don't have enough information yet to really help. How many
processors are there in you MPI job? Can you supply a stack trace so
we can see where the reader is failing? Can you supply a small data
file that fails?

I would guess communication is failing somehow between processors when
the reader tries to read in parallel, but which call and why I haven't
a guess.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909



On Tue, Oct 25, 2011 at 2:41 PM, Ula Popov <ula.popov at gmail.com> wrote:
> Hello all,
>
> Till last week I used vtkCosmoReader to read .cosmo files.
> Now I try to use its parallel version,
> and I have a few questions.
>
> I noticed that there are more functions, like SetRL
> and SetOverlap.
> I set them, should I call update() after that?
>
> i tried to run this:
>     vtkPCosmoReader *cosmo_reader = vtkPCosmoReader::New();
>     vtkUnstructuredGrid *cosmo_data;
>     cosmo_reader->SetRL(256.0);
>     cosmo_reader->SetOverlap(5);
>     cosmo_reader->SetFileName(
> cosmo_filename);
>     cosmo_reader->Update();
>     cosmo_data = cosmo_reader->GetOutput(0);
>
> I get bad-alloc error because of
> "cosmo_reader->Update();"
>
> if i comment this line out,
> it will go through, but the all the fields will have values equal to zero.
>
>
> Thank you,
> Uliana
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