In CurrentPage in Webi

We have converted XI R2 Deski Reports to 4.1 SP 5 Webi Reports.

There is an issue is in the below formula:

Formula in Deski:

=Truncate(Min(ToNumber(<Code Lvl1>)) ,0)  In CurrentPage

After converting to Webi formula:

=RepFormula("=Truncate(Min(ToNumber(<Code Lvl1>)) ,0)  In CurrentPage ")

We need to get the code corresponding to the data in the current page.

Please let me know how to achieve the same,  Thanks.