sandbox

I feel dumb. I can't seem to get the paypal sandbox to function. I put in my sandbox api credentials and itgoes to the
checkout failure page written by webassist saying the transaction cannot be completed. Both on my testing server and my live
server. If I put in the api for the live site it does go to paypal to process but I can't verify if that will work
as I can't seem to test.

using eCart 6 or 5?

Which paypal payment system? Express? PayPal Payments Pro? Standard?

PayPal Pro. I use the PayPal API service.

you did not address the eCart version question.

Sorry, eCart 6

so with eCart 6, the credentials are set using the access point:
WebAssist -> eCart -> Gateway Credentials.

you can check the option to use the sandbox in the Gateway Credentials screen.

Correct, I check the option to use the sandbox in the Gatway Access screen. Then the sandbox api's fill in. I republish the webassist directory and the ecart directories. When I run it I get an error on check saying Transaction Not Completed, We're sorry. Your transaction could not be completed.

Try it out at www.montanasquaredancing.com/fullshoppingcart.php

on the failure page, add the following code:

<?php @session_start(); var_dump($_SESSION); ?>

this will write the response from the gateway to the screen with details on why the transaction is being refused.

PM

Response from paypal is:
Security errorSecurity header is not valid

this means they are not accepting the API Credentials for the sand Box.

double check that you have the API credentials entered correctly, if you are sure they are correct, you may need to request new sandbox API Credentials and make sure to accept the billing agreement.

If you continue to get the Security errorSecurity header is not valid response, contact paypal to have them determine why the API credentials are not being accepted.