Unhandled Error!

Undefined variable: parent_parent

Document	shop:categories
Document type	CMS partial
Line	15
Exception class	Cms_ExecutionException

Code Highlight

	if($category->parent){
		$parent = $category->get_parent();		
		$parents = $category->get_parents();
		if($parent){
			$parent_parent = $parent->get_parent();
		}
		if($parent_parent){
			$parent_parent_parent = $parent_parent->get_parent();
		}
		$level = count($parents);
		switch ($level) {
			case 1:
				$categories = $parent->list_children('front_end_sort_order');

#	Document	Type
2	shop:categories	CMS partial
1	Category	CMS page