PHP Fatal error: 1064:You have an error in your SQL syntax

[05-Mar-2015 13:56:09] PHP Fatal error: 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 :: SELECT categories_id, categories_name FROM categories_description WHERE categories_id= in /includes/classes/db/mysql/query_factory.php on line 120

Hi.

I am getting this error at order processing final checkout, the order processes and the email comes through to the customer and order goes into pending state for customer but that error happens on last complete order click, also if the customer goes into their orders and clicks on view the same error occurs.

Any assistance on what is breaking here would be appreciated

Regards

Nathan

which mods and template are you using?

I suggest that you install myDEBUG Backtrace (http://www.zen-cart.com/downloads.php?do=file&id=1879). That will let you know what module (and line number) called the query_factory class with the invalid SQL.