shopping_cart.php error when changing quantity

[DrByte]

As a start, i suggest that you backup your existing files:
/includes/classes/shopping_cart.php
/includes/main_cart_actions.php

and replace those from a fresh v1.3.7 zip.

It's always a good idea to do a complete file+database backup periodically while making customizations.

[lismith]

Thanks for the advice Dr. Byte. I restored the original files you mentioned and still have the error. Is there anything in the mysql database that would cause this problem? I'd thought it probably had to do with the additional product fields mod or adding the new field with crazy_chris' instructions but I've went through everything and haven't seen any problem (although it's entirely possible I've missed something.) Just wondering if there might be other possible reasons for it.

[lismith]

If I still get the same error when I swtich to the default template, then that rules out it being caused by any customization I've done to the template, right?

[lismith]

I think it's fixed. I changed "recreate session" to false (it was true) and now changing quantity works. I have no idea what that means but it seems to have fixed it.

[Ajeh]

It means that your shop is not as secure as it could be against session id issues ...

You might check with your hosting site and see why it is that you can not use Recreate Sessions on your site ...

While it is good that this fixed the problem ... it really is better to be able to run your site with that set to true ...

[lismith]

OK, this is weird. I changed "recreate sessions" back to true, and now changing the quantity still works. I don't understand this at all. Nothing I tried fixed it until I changed that setting, and now it works just fine with the setting the way it was. Nothing else was changed.

[Ajeh]

Close your browser and clear your cache and cookies ... does it still work?