Hi Stefano, > Is there any plan to write code for native ILU/ICC etc for SeqSELL, at least to have BJACOBI in parallel? (imho) ILU/ICC is a pain to do with SeqSELL. Point-Jacobi should be possible, yes. SELL is really just tailored to MatMults and a pain for anything that is not very similar to a MatMult... Best regards, Karli