message: Missed one...
diff: @@ -329,7 +329,7 @@ int main(int argc, char *argv[])
  }
  // convert eigenvector from HypreParVector to ParGridFunction
  - x = lobpcg->GetEigenvector(i);
  + x = const_cast<const HypreLOBPCG*>(lobpcg)->GetEigenvector(i);
  mode_sock << "parallel " << num_procs << " " << myid << "\n"
  << "solution\n" << *pmesh << x << flush
  