&SAPSCRIPT-FORMPAGES& passing 1 on the first page for 3 pages output in SAP Script

Hi,

Issue when passing value of &SAPSCRIPT-FORMPAGES& to a Subroutine in the First page X window. It is always passing as 1 in the first page instead of 3. But my requirement pass to that subroutine total no. of page (Ex: 3) in the first page X window. How would it be possible? I appreciate your quick response.

Thanks,

Monica