See correct expression bellow. The GOMONTH() will not return empty date in your/this case unless its argument is empty date.

replace datefrom WITH GOMONTH(loData.dLastBillDate+1, -1)

> I have a table that holds a date, I have to fill that date from a text file which I put into a variable before hitting this code.
>

>loData.dLastBillDate = ctod("04/30/2006")
>
>replace datefrom WITH GOMONTH(loData.dLastBillDate, -1) + 1
>

>this gives me a blank datefrom field, because GOMONTH() evaluates to {03/31/2006}, it should come up with {04/01/2006}.
>
>I need this to work in all cases, not just 11 out of 12. Can anyone help me?
>