[ngj]

Dear all,

I have a implementation issue, which gives me a lot of problems. I need to perform a bit of manual exchange of parallel data in my code, because of two boundaries, which are physically connected, but they are not necessarily placed on the same processor. For that I am using the gatherList and scatterList code, and the following is a dummy example of it:

List<scalarField> test(Pstream::nProcs());
test[Pstream::myProcNo()].setSize(100, Pstream::myProcNo());

Pstream::gatherList<scalarField>(test);
Pstream::scatterList<scalarField>(test);

Pout << test << endl;

If I place this piece of code in a solver, then I get the expected output, namely:

[1] 
[1] 2
[1] (
[1] 100{0}
[1] 100{1}
[1] )
[1] 
[0] 
[0] 2
[0] (
[0] 100{0}
[0] 100{1}
[0] )
[0]

But if I place the exact same code inside a boundary condition, where I need to exchange the information between the processors for my boundary conditions, then I receive given the following error:

[0] 
[0] 
[0] --> FOAM FATAL IO ERROR: 
[0] error in IOstream "IOstream" for operation operator>>(Istream&, List<T>&) : reading first token
[0] 
[0] file: IOstream at line 0.
[0] 
[0]     From function IOstream::fatalCheck(const char*) const
[0]     in file db/IOstreams/IOstreams/IOstream.C at line 109.
[0] 
[0]

I have tried leaving either gatherList or scatterList out of the code, but the result is the same.

It should be said that irrespectively of where I use this piece of code, it compiles.

Any help on this problem is greatly appreciated.

Kind regards,

Niels