What would be the correct object reference ?

Hello, I have this error in my form:

TypeError: form1.tabelAnexa.Row.all.item(...).prod.suprNimp is undefined

15:XFA:form1[0]:tabelAnexa[0]:Row[1]:veg2[0]:veg1[0]:prod[0]:oRegularizare[0]:click

This is the code that gives the error:

form1.tabelAnexa.Row.all.item(i).prod.suprNimp.rawValue = "";//

I think it is a reference problem...what would be the correct object path ?

Thanks