[TYPO3] Question about the shop system

[Bill Alexy]

curtis at curtisdw.com wrote:
> I have installed the tt_products extension to setup a shop on my site -- but
> when I go to add categories, I get the following errors.
> 
> Warning: mysql_num_rows(): supplied argument is not a valid MySQL result
> resource in /home/twumcm/public_html/site/typo3/t3lib/class.t3lib_db.php on
> line 729
> 
> Warning: mysql_free_result(): supplied argument is not a valid MySQL result
> resource in /home/twumcm/public_html/site/typo3/t3lib/class.t3lib_db.php on
> line 766
> 
> any ideas why this is ... more importantly, how to fix it?
> 
> thanks,
> 
> 
> Curtis Wiliams
Have you installed all the current dependancies like Table extension?

Regards,
Bill