USPS Shipping Module Won't Uninstall/Reinstall Properly for Upgrading Purposes

Do you have backup files or old renamed files in your directory:
/includes/modules/shipping

Also look in your directory:
/cache

do you have debug logs? If so, what do they read?

No backup files in that directory.

There is a debug file directly related to what we're doing today:

[13-May-2015 09:57:44] PHP Fatal error: Call to undefined function: json_decode() in /home/heros/public_html/zen-cart/includes/modules/shipping/usps.php on line 2148

I think you have reached the point of being stuck between a rock and a hard place ...

You need a newer version of php, at a minimum I would think php 5.4, but this is soon going to be needing an upgrade to php 5.5 ...

Then you need to upgrade to Zen Cart v1.5.4 ...

I attempted a Zen Cart v1.3.9d with php 5.4+ and things appear to work but I just did a quick test to see if it crashed or not, I have no idea if this is working 100%, but that might be a place to start first by upgrading your php version to php 5.4 and see if your site works and the USPS.

But I would really focus on getting your site upgraded to Zen Cart v1.5.4 as soon as you can.

Thanks a lot Ajeh. I have contacted out hosting company and have requested that we be upgraded to at least PHP 5.4 or higher for the time being while I work on upgrading the entire site.

Thanks again for all of your help in resolving this issue.

Sorry to bug you again, but I managed to get PHP upgraded to 5.4.39 and everything on my site seems to work fine from the customer front end, but the admin doesn't work now and instead gives me this error:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Any idea what may be causing this issue by chance?

Additionally, if I have to, can I reinstall the same Zen-Cart version over top of my existing install and have it repair the missing files, but keep settings by chance? Or is that not possible?

Thanks in advance for everything.

"500 Internal Server Error" is a generic message. It's vague, somewhat intentionally in case hackers are poking around, etc.

Check your debug logs in:
/cache

do you have any being created when you try to go to your Admin?

Also see this post:
http://www.zen-cart.com/content.php?105-why-am-i-getting-500-internal-server-error

Ajeh, you sir are a life saver.
I had to contact my host to have the issue resolved, ended up being an issue on their end luckily. Everything is up and running now, including shipping quotes and everything.

Now I can focus on updating my store to the newest zen-cart version while still serving my customers.

Thank you again for all your help!

Fretty

You are most welcome ... glad to hear it was just an issue with your hosting provider and that they were able to correct the problems on their end of things! :smile:

Can you provide the link so we can download the latest version of the USPS shipping module? Do you have step-by-step instructions?

This is the link to the current USPS October 30, 2014 K6 has updates for the November 2, 2014 changes:
https://www.zen-cart.com/downloads.php?do=file&id=1292

NOTE: There will be a new release sometime between now and May 31, 2015 ...