Hello
I want to solve a sparse non-symmetric system of equations using BiCGSTAB precondionned with IncompleteLUT, for example.

Eigen::BiCGSTAB<Eigen::SparseMatrix<double, Eigen::RowMajor>, Eigen::IncompleteLUT<double>> bcg;

I have no problem getting a solution but I don't know how to set the IncompleteLUT parameters drop tolerance (method setDroptol()) and or fill factor (method setFillfactor())
I tried bcg.preconditioner.setDropTol(e) but I got a compilation error
any help would really be appreciated.
best
jac