Oracle Error Message
ORA-22999: CLOB or NCLOB data may have been corrupted
Reason for the Error
CLOB or NCLOB contains invalid character data. One possible cause is that the wrong csid was specified for the external file when calling DBMS_LOB.LOADCLOBFROMFILE or DBMS_XSLPROCESSOR.READ2CLOB to load CLOB or NCLOB data from external files.
Solution
Reload the CLOB/NCLOB data with the correct csid specified for the external file.