404 error with only one GET variable

[eluser]ldg430[/eluser]
jaystang,

Just wanted to thank you for this information!

I was incorporating PayPal's Express Checkout (using tsnax4's library) and ran into this issue when PayPal redirects back to the CANCEL URL (user decides to cancel). PayPal adds a variable ?token=sometoken at the end of the CANCEL URL. On Success (user pays), it adds two variables ?token=sometoken?payerid=someid to the RETURN URL.

My config.php also had

$config['enable_query_strings'] = TRUE;
$config['uri_protocol'] = "AUTO";

CI is able to handle the RETURN URL (two variables) but not the CANCEL URL (one variable). I tried everything from _remap to routing and nothing works until I came across your solution.

Thanks again!