Local numberVar x :=x ;

Local numberVar y :=y ;

Local numberVar z :=z ;

 x :={#nr_Vitellini};

 y :={#nr_Vacche};

 z :={@diff_vit_vac};

if ({VR_CLASSIFICA_PS.ID_ATT_ORIG} like '*J10B*' and {#countCapre}>0) or
({VR_CLASSIFICA_PS.ID_ATT_ORIG} like '*J09B*' And {#countePecore}>0) or
({VR_CLASSIFICA_PS.ID_ATT_ORIG} like '*J11*' and {#countScrofe}>0) or
({VR_CLASSIFICA_PS.ID_ATT_ORIG} like '*J02*' and (x<=y))
then
0
else
if {VR_CLASSIFICA_PS.ID_ATT_ORIG} like '*J02*' and x>y then
 z*{VR_CLASSIFICA_PS.PS}
else
{VR_CLASSIFICA_PS.PS_AGG_NO_P}

 

I added z as difference between vitellini and vacche . It works on the body report but not in the formula