[Phpgroupware-users] Error in calendar

[Jeffrey Blank, P.E.]

Hi all,

I keep getting these ind of errors, what is causing them?  This one 
occured when I tried to post an update to my calendar after I hit submit.*

Warning*: Cannot modify header information - headers already sent by 
(output started at 
E:\apache2\htdocs\phpgroupware\email\inc\class.mail_msg_base.inc.php:10692) 
in 
*E:\apache2\htdocs\phpgroupware\calendar\inc\class.bocalendar.inc.php* 
on line *885*

Jeffrey Blank