Issues on web intelligence trying an upgrade fron Bo xi 3.1 SP5 to SP6

When I try to upgrade BO Xi 3.1 from SP5 to SP6 I have issues on web intelligence using formulas that use nested if.

This formula works fine with SP5, but with SP6 or FP5.4 gives the error                  #CALCOLO even if I don't use the RelativeValue Function or I'm using right operators, if I downgrade to SP5 the formula still works.