ORA-19206
From Oracle FAQ
ORA-19206: Invalid value for query or REF CURSOR parameter
What causes this error?[edit]
The queryString argument passed to DBMS_XMLGEN.newContext was not a valid query, or REF CURSOR.
How to fix it[edit]
Rewrite the query so that the queryString argument is a valid query or REF CURSOR or get programmer to fix the code.