Thanks, I was too busy looking for something less obvious.
Not the first time that has bit me.

>>I understand this pretty much, but not really this line.
>>

if indexseek(InvLinesCursor.Product_ID, .t., 'product', product_id')
>>

>>However, I tried it anyway and when I save the code it tells me "Function Name missing". I suspect I'm missing a delimiter of some sort.
>
>You omitted a single quotation mark before product_id.
>
>Hilmar.