[TYPO3-shop] single view mysql error

[Leen Strijk]

Hello,

I am using tt_products 2.8.0 and typo3 version 2.4.8

All is going pretty well but in single view i get this error:

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL 
result resource in 
/home/leen/domains/websitename/typo3_src-4.2.8/t3lib/class.t3lib_db.php

Is this a products problem or a typo3 problem?
Does anybody know a solution for me?