[Typo3] mysql_fetch_row(): supplied argument is not a valid MySQL result resource

[Samuel Blaas]

Hi all,

i've just implemented a small webpage in typo3, and i've started to do some modifications in the template (setup), concerning the visuals on the page.

now suddenly i got the "mysql_fetch_row(): supplied argument is not a valid MySQL result resource" message. besides the error message, the webpage shows up normally, also the backend works normally. only when i try to edit the template, the error message shows up. 

any hints or ideas to solve the problem?

Thanks!
Sam