ORA-31019: Recursive deletion snapshot too old for string/string
Cause: Changes were made to the structure of a directory while it was being recursively deleted
Action: Try deleting the directory again
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ORA-31018: Error deleting XML document
Cause: The XMLType object pointed to by the given REF could not be deleted because either the REF was invalid or it pointed to a non-existent table
Action: Either use FORCE deletion or supply a valid REF
ORA-31017: Error generating unique OID for XML document
Cause: An error occurred while generating a globally unique OID for storing an XML document
Action: none
ORA-31016: Attempted to delete entry without name
Cause: An attempt was made to delete an entry from the hierarchical resolver without a child name
Action: Supply a child name and try deleting again
ORA-31015: Attempted to insert entry without name
Cause: An attempt was made to insert an entry into the hierarchical resolver without a child name
Action: Supply a child name and try inserting again
ORA-31014: Attempted to delete the root container
Cause: An attempt was made to delete the root container in the hierarchical index
Action: Do not delete the root container
ORA-31013: Invalid XPATH expression
Cause: XPATH expression passed to the function is invalid
Action: Check the xpath expression for possible syntax errors
ORA-31012: Given XPATH expression not supported
Cause: XPATH expression passed to the function is currently unsupported
Action: Check the xpath expression and change it to use a supported expression
ORA-31011: XML parsing failed
Cause: XML parser returned an error while trying to parse the document
Action: Check if the document to be parsed is valid
ORA-31010: XML element index string exceeds maximum insertion index string
Cause: An attempt was made to insert an XML element at an invalid index location in the node
Action: Choose a new index that falls within the allowed range