Error in page after some time

[eluser]XMadMax[/eluser]
Hey nsudarshan31,

This error are produced when the session tries to write the cookie in the header of the response, but other has starting to write text in this response.

This can be :

Any echo before
Any space after clossing php : ?> [SPACES]
A previous error, normally this error are shown in screen. Activate log and review ho is outputing before.

Xavier