From the information you’ve provided, the most likely reason you are getting that parameter error is because there are two different sets of parameters being used here. The ‘total’ parameter is part of our custom parameter set used with 3rd-party shopping carts. The rest of your parameters are part of the Plug-n-Play parameter set. For the Plug-n-Play cart, you would not have to actually specify the total dollar amount since it is based on a calculation between the quantity that the customer wants and the product’s price. Including the ‘total’ parameter in with the Plug-n-Play parameters will generate the parameter error that you are receiving.

The two Knowledge Base articles below describe the parameter sets in full:

## Plug-n-Play Parameters
https://support.2co.com/deskpro/faq.php?do=article&articleid=315

## 3rd-Party Cart Parameters
https://support.2co.com/deskpro/faq.php?do=article&articleid=314

If you still experience parameter errors after you have made the appropriate fixes to your purchase URL, then it could be due to a specific account status. To resolve any further issues regarding this parameter error, please open up a support ticket using the link below:

https://support.2co.com/deskpro/newticket.php