The _PAGETOTAL holds the total number of pages in a report not in a group. See Re: _Pagetotal is not correct on report Message #1119556 and
_PAGETOTAL System Variable in the help for details.

>When printing a new group, I set it to start on new page number 1,
>I want to print out Page 1 of 10, I use the _pagetotal for the page total,
>but when printing the new group the value of _pagetotal not correct.
>
>For example: I want,
>Group 1: Page 1 of 10
>Group 2: Page 1 of 5
>Group 3: Page 1 of 15
>
>The value of _pagetotal always 1.
>How to solve the problem?
>