Voucher + PayPal = Problem

[TheReal]

Whenever I try to use a voucher and during last stage of the order (when customer click on the PayPal icon to move to paypal to pay for the order) this error pops up: 

 

PLEASE TRY TO CONTACT THE MERCHANT:

1. <b>PayPal response:</b>
2. TIMESTAMP -> 2014-08-04T15:51:06Z
3. L_ERRORCODE0 -> 10401
4. L_ERRORCODE1 -> 10426
5. L_ERRORCODE2 -> 10431
6. L_ERRORCODE3 -> 10413
7. L_SHORTMESSAGE0 -> Transaction refused because of an invalid argument. See additional error messages for details.
8. L_SHORTMESSAGE1 -> Transaction refused because of an invalid argument. See additional error messages for details.
9. L_SHORTMESSAGE2 -> Transaction refused because of an invalid argument. See additional error messages for details.
10. L_SHORTMESSAGE3 -> Transaction refused because of an invalid argument. See additional error messages for details.
11. L_LONGMESSAGE0 -> Order total is invalid.
12. L_LONGMESSAGE1 -> Item total is invalid.
13. L_LONGMESSAGE2 -> Item amount is invalid.
14. L_LONGMESSAGE3 -> The totals of the cart item amounts do not match order amounts.
15. L_SEVERITYCODE0 -> Error
16. L_SEVERITYCODE1 -> Error
17. L_SEVERITYCODE2 -> Error
18. L_SEVERITYCODE3 -> Error

 

 

How can this be fixed?

 

Please note that without using voucher the shop works 100%.

I run 1.5.6.1 if it matters.

Edited August 4, 2014 by TheReal (see edit history)

[vekia]

duplicated, solved there:

http://www.prestashop.com/forums/topic/348485-voucher-paypal-error-10401-10426-10431-10413/