Hi, I resolved my problemthe instruction is the follow form= if( HT.rawValue >0) then (WT.rawValue)*703/((HT.rawValue*HT.rawValue))I don't need put the filed to give the new value becasue I am on thefield.thank you

I use first this oneBMI.rawValue= (WT.rawValue)*703/((HT.rawValue*HT.rawValue))but I have this errorScript failed (language is formcalc; context is xfa[0].form[0].F[0].#subform[1].BMI[0]) script=(Weight*703)/Height*Height)Error: arithmetic over/underflow. I check the error on this forum and replace ...