ORA-22998

Error: ORA-22998: CLOB or NCLOB in multibyte character set not supported

Causa: A CLOB or NCLOB in a fixed-width or varying-width multibyte character set was passed to a SQL character function which does not support multibyte LOB data.

Acción: Use DBMS_LOB functions such as DBMS_LOB.INSTR() and DBMS_LOB.SUBSTR() or use PLSQL DBMS_LOB.READ/WRITE to access LOB data.