Error trying to add ad module

[jt86]

I'm trying to add an ad module to a page using the edit page feature. When I click to save the page I get this pop-up- Error saving page.
(Error code 200)
Please try again.

Using vB5.1.0
I've even tried it just with plain text instead of the ad code and that won't save either

[jt86]

I've come out of the edit page and it did actually save despite saying it hadn't, so can someone please delete this now?

[Wayne Luke]

Most likely cause is a php notice or some other non-essential warning message. There are a number of these and the developers work to clear them up as they can. If you can turn off display errors on your site, it should prevent it in the future.