Question : Operand error

I am getting an operand without operator error on the line below, I just can't see why?   Can someone help?  thanks


=iif([text211]0 and not isnull([txtCost]*sfrm19.Form!txttotal,[Text196]*[ProjectedTotalExtUOM])

Answer : Operand error

thats what I mean, u have 2 fields in it

What u had was

IsNull(txtCost * sfrm19.form!txtTotal

then u had a comma

then another field

IsNull only takes one argument

I wasnt sure if u wanted

IsNull(txtCost)

or

IsNull(txtCost * sfrm19.form!txtTotal)