critial error problem please help

[popustda]

Hello guys,
Today i received this critical error after 7days of my website being active for customers. ihavent changed anything so i wonder why this error. is it connected with particular product or something else

thanks

[abantecart]

This can happen if someone is changing parameters in some of URL request. I would not worry too much. If this happen allot, you can try to put trace of complete URL request to see what is going on. 

[eCommerce Core]

Anyway, you can provide more information? Can you check Apache log at the same time and grab requested URL?