SAPSCRIPT-FORMPAGES starts with 0

Dear All,

I would like to see the total number of pages in a sapscript form by using variable SAPSCRIPT-FORMPAGES. But unfortunately this variable always starts with 0 in our system, and increases in every subsequent pages.

So when I do &PAGE& of &SAPSCRIPT-FORMPAGES&, it will show,

1 of 0

2 of 1

3 of 2

what could be the problem? please advise.

Thank you.