Warning: Cannot modify header information - headers already sent by (using Worldpay)

[linivan]

It would seem that you have something running in a template file which is trying to do a redirect *after* the page has started drawing ... hence the "headers already sent" message appearing when the redirect header-change function gets called.

You made mention of "Worldpay". What happens if you turn off the worldpay module and enable the Check/MoneyOrder module instead? Does the error go away? If so, then logic would suggest that the problem is somewhere in the Worldpay module you're using.

Hi all

I have the same problem.
I believe nothing to do with the additional space problem.
If I don't select worldpay and use paypal or COD, then everythinng works fine.