Joomla error Warning: session_start() [function.session-start]:

At editing Joomla configuration settings in file configuration.php you can easly get error Warning: session_start() [function.session-start]:

Warning: session_start() [function.session-start]: Cannot send session cookie – headers already sent by
(output started at ..\\wwwroot\joomla\configuration.php:1) in ..\\wwwroot\joomla\libraries\joomla\session\session.php on line 432

You can get this error at saving changes in configuration file when editing in Notepad, dreamweaver or other app. The file was saved in non ANSI code and some characters appeares in file added by app ( mostly space at the beggining).

How to resolve warning session_start

Simply!. Just reopen file configuration.php and save it in ANSI code.