[dune-pdelab] Parallel vtkwriter hangs during output on multiple processors

[Alexander Schlaich]

Hi there!

My name is Alexander Schlaich and I'm working at the Institute for 
Computational Physics at University of Stuttgart. For my diploma thesis I'm 
actually implementing a solver for the nonlinear Poisson Boltzmann 
equation for which I adapted example 2 of dune-pdelab-howto. Works fine.

When parallelizing my code and using more than 1 processor vtkwriter crashes 
somehow, One output file is written correctly, a second one is touched and my 
program hangs up. I orientated on example 6 for parallelization but don't see 
how to use vtkwriter in another way.

Does anybody know what the problem is? Any hint would be much
appreciated.

Many thanks in advance,


Alex

---
My code is attached.
I'm using:

dune-common revision: 6204
dune-grid revision: 7038
dune-istl revision: 1323
dune-localfunctions revision: 908
pdelab revision: 758
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