Error: The specified product (reference 33) has just been removed from the catalog

[happyatom]

This message now appears when trying to order any new products that I have added to catalog. Existing products continue to work fine. But if I modify an existing product, it generates this message on ordering. I have seen answers to this problem relating to buttons, but I do not use image buttons.

TIA

Paul

[happyatom]

Norton Firewall

Sorted all problems - Norton Firewall getting in the way - turned it off, refreshed site and everything now works fine.