Hello Allesandro, > Sorry about that, here is the ICE: > > $ gfortran -fcoarray=lib -c cg.f > cg.f:1464:22: > > > v, iv(1), iv(n+1), nnza ) > 1 Can you reduce this to a self-contained test case (and submit a PR)? Otherwise, it is extremely hard to debug. Regards Thomas