Error? on Example 16-7 XMLFOREST: Generating Elements with Attribute and Ch

Question

Error in example on page http://download-east.oracle.com/docs/cd/B19306_01/appdev.102/b14259/xdb13gen.htm#i1028612
Example 16-7 XMLFOREST: Generating Elements with Attribute and Child Elements
Example appears as
SELECT XMLElement("Emp",
                  XMLAttributes(e.first_name ||' '|| e.last_name AS "name"),
                  XMLForest(e.hire_date, e.department AS "department"))
AS "RESULT"
FROM employees e WHERE e.department_id = 20;
1. employees table not qualified as hr.employees
2. e.department as "department" should be e.department_id as "department"
corrected would be
SELECT XMLElement("Emp",
                  XMLAttributes(e.first_name ||' '|| e.last_name AS "name"),
                  XMLForest(e.hire_date, e.department_id AS "department"))
AS "RESULT"
FROM hr.employees e WHERE e.department_id = 20;albert

Answer 1

It was subreport-related, though I still do not know the exact root cause.
I was having trouble with both the built-in export as well as a custom process.
Removing the subreports as suggested, I isolated the failure to one of the three subs and rebuilt this subreport from scratch (it was only three fields) and now the report has no trouble with the pdf export. I am not sure if it had a resolvable technical issue or if it was just corrupted, as it is now working, I am not going to expend much energy on finding out.
Thanks for the suggestion.