ORA-22275: invalid LOB locator specified

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ORA-22275: invalidLOB locator specified
Cause: There are several causes: (1) the LOB locator wasnever initialized; (2) the
locator is for a BFILE and the routine expects a BLOB/CLOB/NCLOB locator; (3)
the locator is for a BLOB/CLOB/NCLOB and the routine expects a BFILE locator;
(4) trying to update the LOB in a trigger body -- LOBs in trigger bodies areread
only; (5) the locator is for a BFILE/BLOB and the routine expects a CLOB/NCLOB
locator; (6) the locator is for a CLOB/NCLOB and the routine expects a
BFILE/BLOB locator;
Action: For(1), initialize the LOB locator by selecting into the locator variable or
by setting the LOB locator to empty. For (2),(3), (5) and (6)pass the correcttype of
locator into the routine. For (4), remove the trigger body code that updatesthe
LOB value.