From: Omar AlAbbasi <omabbasi@gm...>  20110717 10:02:28

Thanks Jed for the reply, I tried what you suggested but since the matrix that I have is called matrix_A, I tried the following: Mat A = matrix_A.mat(); matrix_A is created by SparseMatrix<Number>& matrix_A = *eigen_system.matrix_A; I got the following error error: ‘struct libMesh::SparseMatrix<double>’ has no member named ‘mat’ Do you know anyway around this error? Thanks, Omar 