SimpleMVC Error

An error occured when processing this action.

Misssing method for action function.session-start in Action-class for action index (Request URI: /index/function.session-start)

How to fix this error?

Add the method below to webapp/actions/index_action.php:

class IndexAction extends Action {

  public function function.session-start() {

    // ...

  }

}

Backtrace

#0  require_once() called at [/www/v3/libs/utils/action_errors.php:21]
#1  ActionErrors::missingMethod(index, function.session-start) called at [/www/v3/libs/action.php:193]
#2  Action::_executeAction() called at [/www/v3/webroot/index.php:30]