Dear all

We are exploring different linear solvers for a mixed H(div) method for
poisson equation.

We want to try both block solvers based on Schur form and also gmres,
direct, etc.

So we declare matrices and vectors of block form.

But then we are not able to use TrilinosWrappers::SolverGMRES with these
blocked variables.

Is this a fundamental limitation or something else ?

I have attached a MWE which shows compiler error when I call GMRES.

thanks
praveen

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