Error message

• Notice: Undefined index: node in ndacc_preprocess_page() (line 26 of /home/adanoaacpc/public_html/sites/all/themes/custom/ndacc/template.php).
• Notice: Undefined index: node in ndacc_preprocess_page() (line 26 of /home/adanoaacpc/public_html/sites/all/themes/custom/ndacc/template.php).