Error message

• Notice: Undefined index: seven in _drupal_maintenance_theme() (line 75 of /usr/home/www/ftp/nusmas/idejos/includes/theme.maintenance.inc).
• Notice: Trying to get property of non-object in _drupal_theme_initialize() (line 146 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/home/www/ftp/nusmas/idejos/includes/module.inc:980) in drupal_send_headers() (line 1044 of /usr/home/www/ftp/nusmas/idejos/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/home/www/ftp/nusmas/idejos/includes/module.inc:980) in drupal_send_headers() (line 1044 of /usr/home/www/ftp/nusmas/idejos/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/home/www/ftp/nusmas/idejos/includes/module.inc:980) in drupal_send_headers() (line 1044 of /usr/home/www/ftp/nusmas/idejos/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/home/www/ftp/nusmas/idejos/includes/module.inc:980) in drupal_send_headers() (line 1044 of /usr/home/www/ftp/nusmas/idejos/includes/bootstrap.inc).
• Notice: Trying to get property of non-object in _theme_build_registry() (line 536 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Notice: Trying to get property of non-object in _theme_build_registry() (line 536 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Notice: Trying to get property of non-object in _theme_build_registry() (line 536 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/home/www/ftp/nusmas/idejos/includes/module.inc:980) in drupal_send_headers() (line 1044 of /usr/home/www/ftp/nusmas/idejos/includes/bootstrap.inc).
• Notice: Undefined index: seven in theme_get_setting() (line 1153 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Notice: Trying to get property of non-object in theme_get_setting() (line 1190 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Notice: Trying to get property of non-object in theme_get_setting() (line 1200 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Notice: Undefined index: seven in template_preprocess_maintenance_page() (line 2423 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Notice: Trying to get property of non-object in template_preprocess_maintenance_page() (line 2423 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Warning: array_keys() expects parameter 1 to be array, null given in template_preprocess_maintenance_page() (line 2426 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).
• Warning: Invalid argument supplied for foreach() in template_preprocess_maintenance_page() (line 2426 of /usr/home/www/ftp/nusmas/idejos/includes/theme.inc).