When the footer goes to the 2nd page the page subform is incremented so
you will have to reference the page subform as well. I suggest that you
add a button (this is for a test only) to the footer subform and add the
code app.alert(this.somExpression). Now render the form and make sure
the footer stays on one page. Hit the button and take note of the
someExpression. Now add enough rows to force the footer to a new page.
Hit th ebutton again and take note of the changed somExpression. So to
solve...