Error maps in the ω, i plane, for stars with masses equal to 3, 5, and 7 M_⊙ (top, middle, and bottom panel, respectively). The colour stands for the absolute error between the retrieved and the original models defined as , where M is in M_⊙ and i is in radians. The subscripts ‘sol’ and ‘obs’ stand for the solution and the original model, respectively. The yellow cells correspond to differences greater than 10⁻², where the resolution possibly failed.