HTTP 500 at end of checkout ?

[iang000]

I get the HTTP 500 error message only when I click the Confirm Order button at the very end of the transaction. The order does get confirmed but the customer will see that error instead of a nice page to tell them the order was confirmed. Anybody know what to look for to fix this? I use an SSL site with Network Solutions.

[DrByte]

What payment module are you using when this happens?
What version of Zen Cart is installed?
What addons/contributions are installed?

[iang000]

I tested it in 3 payment modules, Credit Card which for me is not integrated but I use a manual entry for credit cards, money orders, and Paypal. All three give the same error. I only use the add-on for Google Analytics (which I think is possibly the problem as I just installed the new simple one). I have zencart 1.3.7 installed. How can I trace the code to find out why this is happening? As I metioned before the order does go through and the email is sent out but the customer will get the HTTP 500 error. Not a nice way to greet a customer who made an order.

Also I use Network Solutions SSL certificate which is not the best as it doesn't recognize when I am in SSL mode and not.

[iang000]

Here are the error messages in the log:

Premature end of script headers: index.php, referer: https://www.batteriesforipod.com/zen...t_confirmation

[DrByte]

I only use the add-on for Google Analytics (which I think is possibly the problem as I just installed the new simple one). I have zencart 1.3.7 installed. How can I trace the code to find out why this is happening?

What happens if you remove the google analytics code to test ?
Did it work without these errors before you installed that code?

One way to find out exactly what's different between your site and a working "base" install is to compare all your code vs the master code. Here's one documented approach to such comparison:
http://www.zen-cart.com/wiki/index.p...Obscure_Issues

Also I use Network Solutions SSL certificate which is not the best as it doesn't recognize when I am in SSL mode and not.

Clarification: It's not your certificate. It's the Networks Solutions webserver configuration ... their hosting services typically have this problem. There is no solution from a coding perspective. Switching hosts has been the only option for truly engaging SSL support and getting the padlock to show, etc.

[iang000]

Thanks for the information. The wiki info is great but it will be very time consuming. There are so many files to compare. I just did a sample of a few and found there are differences with CR and CRLF probably due to the server being Unix and my computer is Windows. I was wondering if there is some sort of a debug available in php which allows the user to execute one statement at a time so the exact statement that is killing my script can be found. I know the order is actually completed, so I could start debugging right after that line of code. BTW where might I find the php code that is being executed as the customer presses the Confirm the order button? That would point me to a good place to start looking.

[iang000]

Here is another difference: the version I am using is: 5137 2006-12-09 22:02:24Z wilt (in application_top.php), the newest one I downloaded is: 6526 2007-06-25 22:59:38Z drbyte. Should I upgrade to this newer version?

[DrByte]

You didn't answer these questions:

I only use the add-on for Google Analytics (which I think is possibly the problem as I just installed the new simple one). I have zencart 1.3.7 installed. How can I trace the code to find out why this is happening?

What happens if you remove the google analytics code to test ?
Did it work without these errors before you installed that code?

http://www.zen-cart.com/index.php?ma...roducts_id=378

[iang000]

Forgot to post the answer. I removed the Google analytics code and it didn't help. I don't remember it ever working correctly, I used to think it was just my browser but now I know it is always happening even with Firefox.

[DrByte]

I still strongly recommend the file-by-file comparison.
You'll need to be familiar with it in order to do site upgrades anyway.
Fixing your CR vs CRLF problems sooner than later is also a good idea. Usually making some settings changes in FTP can help with this. If you installed via fantastico, they likely left all the files in a bad state with mixed up line-endings. In that case a reinstall w/o fantastico is most often the easiest overall fix.

Your problems are most likely related to some sort of customization or addon happening in the template. Otherwise the error would be expected to prevent the order from being saved properly.

Which template files have you customized? or been affected by addons?
Are you using any affiliate-tracking systems?

Zen Cart Program Execution Flow:
http://www.zen-cart.com/index.php?ma...roducts_id=378