Preview Error after Product Copy

[Kermy]

I've just copied a section from one site to another. I've removed any custom properties that existed from the initial site. In one sub-section, if I try to preview the page, I get the error:

'There was an error trying to generate the preview page. Try previewing the whole site.'

Having tried that, I then get the error:

'Error generating HTML pages
Section: Online Catalogue'

This only happens for one of the subsections that were copied over. Any ideas as to what's causing this?

[Kermy]

Fixed it - the problem occured because the pricing structures were different between the two sites. Checked the 'Generated' box for all prices, and everything copied fine.