Paypal IPN Checkout & GV Error

I'm running v1.3.8a

When a customer checks out with paypal (using a Gift Certificate) it all works properly, but when they return to my site, they are returned to page 2 of the checkout process with a big red warning:

It appears that the amount you have tried to apply and your Gift Certificate balance do not match. Please try again.

The order goes through fine (they get order confirmation, etc) but they are not returned to the checkout success page, and instead they are made to think their order did not go through when it actually did.

Anyone?

I'm running v1.3.8a (new installation)

When a customer checks out with paypal (using a Gift Certificate) it all works properly, but when they return to my site, they are returned to page 2 (checkout_payment) of the checkout process with a big red warning:

It appears that the amount you have tried to apply and your Gift Certificate balance do not match. Please try again.

The order goes through fine and I get payment (they get order confirmation, etc) but they are not returned to the checkout success page, and instead they are made to think their order did not go through when it actually did.

Hi,

Just to double check. when you say new installation, does this mean that, apart from template modification, you have no other contributions installed.

If you do could you let us know which ones.

I've done a clone of the Flat Rate shipping module. And also an editable sidebox contribution, but that's all.

Anyone?

This only happens when a GC is used. I have my debug on, and I don't see any errors in the debug messages (although I can't say that I really know what I'm looking for).

Hi.

Another question.

When the customer uses a Gift Certificate - are they using it to cover the whole amount or just as a partial payment.

They are redeeming the full amount of the GC, but it only covers part of the total cost (partial payment is still due).

When/if the whole amount is covered by the GC, they don't make their way to paypal, they go right to my checkout_success page.

What other payment modules are enabled besides PayPal?

DrByte:

What other payment modules are enabled besides PayPal?

Just Gift Certificate. There are others that are "installed" but not active.

Use the uninstall or remove for all payment modules that are not being used.

Ok, I've done that. Is there any way I can test this now?

Nope, just tested it and made a purchase in my own shop, it still happens!

I'm directed to page 2 of the checkout with the nasty red message, and my cart contents are still intact (like I never paid). But my order shows up in my order history, I get a confirmation email of my order and payment. Then if I log out, then log back in, my cart clears.

If I were to install a brand new uncustomized Zen Cart site using v1.3.8a, what would I have to do to it in order to configure it exactly like your store, so that I could see the exact same problem happening?

I installed a brand new version of 1.3.8a

I use Paypal IPN and Money order for shipping.

I've cloned the flat rate shipping module (so I have 3 flat rate shipping options). I also installed a new zone (all destinations except US & Canada).

I installed an editble sidebox mod.

I use the multiple images option (but have the images vertically instead of horizontally).

I offer regular products aswell as downloads, and of course Gift Certificates.

I removed the Gift Certificate redemption code box from the checkout_payment page, to force users to enter the code on the Gift Certificate FAQ page instead (I didn't like how you had to enter the code on the checkout page, then back out of your cart and go back in, in order to apply the amount -- it was too confusing, so I just removed the redemption code box from that part of the page and redirect them via a clickable link to enter it on the FAQ page then go back to their cart where they could apply the amount).

I've done a bit of customizing to the template (colors, table width, changed some working in the language files).

I really can't think of anything else I've done.

Any suggestions?

Having just done a fresh install of Zen Cart, set up PayPal IPN, sent myself a Gift Certificate, redeemed it, and completed a checkout properly without the symptoms you describe ... no, I have no suggestions.

Do you have any taxes set up? If so, do taxes apply to the orders for which you're encountering odd behaviors?

I have no taxes set up.

You might want to try this: http://www.zen-cart.com/forum/showpost.php?p=483792&postcount=5