Gallery Error after upgade 1.12.1 to 2.15.1

[Barrowboy]

Hi

I have upgraded a site from 1.12.1 to 2.15.1 and all works perfectly except the Gallery.

The template for the gallery is a copy of Lightbox with some mods and was XML exported from the previous site but when run on the new install I get the following error.

Warning: Division by zero in /home/mysite/public_html/mysite /lib/smarty/sysplugins/smarty_internal_templatebase.php(151) : eval()'d code on line 128

I do not understand the "Division by Zero" what that refers to.
Are there settings in the new version I have overlooked.

Thanks

[Barrowboy]

OK sorted.

I had forgot to set the number of images per page.