diff --git a/dune/solvers/iterationsteps/multigridstep.hh b/dune/solvers/iterationsteps/multigridstep.hh index 6dbd016161c22c996567136e30097c8f8db58494..ac18ac10a2d0db21a2e322d2b2f36959423af4df 100644 --- a/dune/solvers/iterationsteps/multigridstep.hh +++ b/dune/solvers/iterationsteps/multigridstep.hh @@ -140,6 +140,9 @@ mat_[level_] = &mat; x_[level_] = x; rhs_[level_] = rhs; + + // Preprocess must be called again, to create the new matrix hierarchy + preprocessCalled = false; } template <class DerivedTransferHierarchy>