Defaulting Rules using PL/SQL Api - ORA error

Question

Hi All,
Iam using the PLSQL api for OM defaulting rules. Based on the item in the Sales order line, Line type has to be defaulted.
I have put debug messages and iam able to see successful execution and the required Line type value is returned. No exception is raised.
Error ORA-06502 PL/SQL numberic to value error. Character to number conversion error is thrown outside the custom package.
PLSQL api is coded as below.
CREATE OR REPLACE PACKAGE BODY xx_default_ordertype IS
G_PKG_NAME      CONSTANT VARCHAR2(30) := 'XX_DEFAULT_ORDERTYPE';
FUNCTION get_trans_type
p_database_object_name IN VARCHAR2,
p_attribute_code IN VARCHAR2
RETURN varchar2 IS
l_trans_type VARCHAR2(30);
-- l_item_id NUMBER := ONT_LINE_DEF_HDLR.g_record.ORDERED_ITEM_ID;
BEGIN
SELECT b.name
INTO l_trans_type
FROM OE_TRANSACTION_TYPES_tL b,
oe_transaction_types_all a
WHERE a.transaction_type_id=b.transaction_type_id
AND attribute1=ONT_LINE_DEF_HDLR.g_record.INVENTORY_ITEM_ID;
RETURN l_trans_type;
EXCEPTION
WHEN NO_DATA_FOUND THEN
RETURN l_trans_type;
WHEN OTHERS THEN
insert_sstab(7,'in exception');
IF OE_MSG_PUB.Check_Msg_Level (OE_MSG_PUB.G_MSG_LVL_UNEXP_ERROR) THEN
OE_MSG_PUB.Add_Exc_Msg (G_PKG_NAME, 'xx_default_ordertype');
END IF;
RAISE FND_API.G_EXC_UNEXPECTED_ERROR;
END get_trans_type;
END xx_default_ordertype;
Not able to figure out where the ORA error is getting raised from.
Kindly help
Edited by: user11969666 on Mar 19, 2011 7:47 AM

Answer 1

btw, I did try your test and it didn't error for me:
CREATE OR REPLACE PACKAGE xx_default_ordertype IS
FUNCTION get_trans_type
p_database_object_name IN VARCHAR2,
p_attribute_code IN VARCHAR2
RETURN varchar2;
end xx_default_ordertype;
CREATE OR REPLACE PACKAGE BODY xx_default_ordertype IS
FUNCTION get_trans_type
p_database_object_name IN VARCHAR2,
p_attribute_code IN VARCHAR2
RETURN varchar2 IS
l_trans_type OE_TRANSACTION_TYPES_tL.name%TYPE :='a';
BEGIN
RETURN l_trans_type;
EXCEPTION
WHEN NO_DATA_FOUND THEN
RETURN l_trans_type;
END get_trans_type;
END xx_default_ordertype;
begin
dbms_output.put_line(xx_default_ordertype.get_trans_type('X','Y'));
end;
/