Oracle Message ORA-19297 - XQDY0064: It is a dynamic error if the value of the name expression in a computed processing instruction constructor is equal to XML (in any combination of upper and lower case

ERRORXQDY0064: It is a dynamic error if the value of the name expression in a computed processing instruction constructor is equal to XML (in any combination of upper and lower case
CAUSEAn error occurred during the processing of the XQuery expression.
ACTIONCheck the detailed error message for the possible causes.