Hi, using scilab 5.2.2 I have : ->e1=1e-20;e2=1e-21 e2 = 1.000D-21 -->[e1 e2] ans = 10^(-20) * 1. 0.1 and using scilab 6 _>e1=1e-20;e2=1e-21 e2 = 1.000D-21 ->[e1 e2] ans = 0. 0. Is it good?