ORA-06531:collection error in trigger.

Question

We are using DBMS_XMLSave to insert data into an object nested view. Error ORA-06531 causes the trigger to fail when trying to access the collection count.. Below is the XML, view and trigger. What is missing or are we running into a bug?
Thanks
****************************** XML ****************************
<?xml version = '1.0'?>
<ROWSET>
<ROW>
<ArrestNumber>2</ArrestNumber>
<IMErrors>
<IMErrors_ITEM>
<ResponseErrorCode>CODE 2</ResponseErrorCode>
<ResponseErrorDesc>DESC 2</ResponseErrorDesc>
</IMErrors_ITEM>
<IMErrors_ITEM>
<ResponseErrorCode>CODE 1</ResponseErrorCode>
<ResponseErrorDesc>DESC 1</ResponseErrorDesc>
</IMErrors_ITEM>
</IMErrors>
</ROW>
</ROWSET>
************************* VIEW ****************************
CREATE OR REPLACE TYPE sjs.imres_error_type AS OBJECT
("ResponseErrorCode"     VARCHAR2(10),
"ResponseErrorDesc"     VARCHAR2(4000))
CREATE OR REPLACE TYPE sjs.imres_errors_type AS TABLE OF imres_error_type
CREATE OR REPLACE VIEW sjs.imresponse
AS SELECT ith.a_id AS "ArrestNumber",
CAST(MULTISET(SELECT ire.errorcode,
ire.errordesc
FROM sjs.imresponseerrors ire
WHERE ire.ith_id = ith.ith_id) AS imres_errors_type) AS "IMerrors"
FROM sjs.imtransactionhistory ith
************************* TRIGGER ****************************
CREATE OR REPLACE TRIGGER sjs.imresponse_new INSTEAD OF INSERT ON sjs.imresponse FOR EACH ROW
DECLARE
error_list      imres_errors_type;
error_t      imres_error_type;
ith_id_holder NUMBER(18);
cnt          NUMBER;
BEGIN
INSERT INTO imtransactionhistory(a_id,interfacetransaction,ith_nysid,ith_fbi,ith_cjtn)
VALUES(:new."ArrestNumber",'PENDING','PENDING','PENDING','PENDING');
SELECT sjs.ith_sequence.currval INTO ith_id_holder FROM dual;
error_list := :new."IMerrors";
cnt := error_list.count;
-- FOR i IN 1..cnt LOOP
-- error_t := error_list(i);
-- INSERT INTO imresponseerrors(ith_id,errorcode,errordesc)
-- VALUES(ith_id_holder,error_t."ResponseErrorCode",error_t."ResponseErrorDesc");
-- END LOOP;
END;
************************* ERROR ****************************
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception: oracle.xml.sql.OracleXMLSQLException:
'oracle.jdbc.driver.OracleSQLException: ORA-06531: Reference to uninitialized collection
ORA-06512: at "SJS.IMRESPONSE_NEW", line 11
ORA-04088: error during execution of trigger 'SJS.IMRESPONSE_NEW'
' encountered during processing ROW element 0. All prior XML row changes were rolled back. in the XM
ORA-06512: at "SJS.XML_UTIL", line 72
ORA-06512: at "SJS.IMRES", line 35
ORA-06512: at line 6

Answer 1

Frank
error_list is a collection. What happens if you use an index with it? E.G.
error_list(1) := :new."IMerrors";
Cheers, APC