Hi Georg, not sure about your problem. Have you reconfigured and re-build dune-istl? In any case, try the ISTL tests using UMFPack. If they fail, it is not a DuMuX issue. What about the DuMuX test cases using UMFPack?
Bye Christoph -- A mathematician is a scientist who can figure out anything, except such simple things as squaring the circle and trisecting an angle. [Evan Esar (1899-1995), Esar's Comic Dictionary]
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