Error message

• Deprecated function: Creation of dynamic property MergeQuery::$condition is deprecated in MergeQuery->__construct() (line 1357 of /home/acad/public_html/academic/textbook/includes/database/query.inc).
• Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1887 of /home/acad/public_html/academic/textbook/includes/database/query.inc).
• Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1887 of /home/acad/public_html/academic/textbook/includes/database/query.inc).
• Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1887 of /home/acad/public_html/academic/textbook/includes/database/query.inc).
• Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1887 of /home/acad/public_html/academic/textbook/includes/database/query.inc).