Error message

• Notice: Undefined index: und in include() (line 167 of /var/www/vhosts/s17473973.onlinehome-server.info/httpdocs/wluml/sites/all/themes/WELDD2/templates/node--resources.tpl.php).
• Notice: Trying to get property of non-object in include() (line 169 of /var/www/vhosts/s17473973.onlinehome-server.info/httpdocs/wluml/sites/all/themes/WELDD2/templates/node--resources.tpl.php).