error: MODULE_PAYMENT_PAYPALWPP_GEN_ERROR (10410 Invalid token)

[DrByte]

re-reading the log (sorry should have been in first post) I see it has:
$this->showPaymentPage NOT true, and NO custom page selected ... using SHIPPING as default

I have IPN turned on (I copied the url from the admin / paypal express config screen for the site has real url not xxxx's):
Instant Payment Notification (IPN) On
Instant Payment Notification (IPN) URL: http://www.xxxx.co.uk/shop/ipn_main_handler.php

isnt that the showPaymentPage ?

No. $this->showPaymentPage is a boolean flag. There is no error indicated in that line of your debug log. It is an informational message only.

Your "token" problem is related to receiving or sending bad data to PayPal. Presumably this is a result of your having mismatched or non-standard Zen Cart-supplied files in use for your Express Checkout module.

[ChrisZ]

Hi

Thanks for your assistance, and sorry for my missunderstanding of the usage of the constant name!

The problem is resolved ....I re-uploding the patch and re-entered the API Signature details ... something must have got fubared before, as you suggested.

Thanks again

Chris