Error in imageTools.class.php on line 101

Hi! I add the goods, in option Images I tick off point "Automatically to create the reduced images". At attempt to keep the goods I see this error:

Code: Select all

Fatal error: Class 'ps_product_files' not found in /home/virtwww/w_testmag_03fcc9a6/http/administrator/components/com_virtuemart/classes/imageTools.class.php on line 101

Somebody can help me?