SQL statement works with SQL/Plus - but not with ODBC

Question

Hi all,
I have a rather copmplex SQL statement:
BEGIN
UPDATE ContentDataTable
SET SYMBOLIC_PATH_PARENT = N'/Test',
SYMBOLIC_NAME = N'HAWK01.GIF',
VERSION_NUMBER = 1 +
SELECT MAX(VERSION)
FROM
(SELECT MAX(VERSION_NUMBER) AS VERSION
FROM ContentDataTable WHERE
SYMBOLIC_PATH_PARENT = N'/Test' AND
SYMBOLIC_NAME = N'HAWK01.GIF'
UNION
SELECT MAX(VERSION_NUMBER) AS VERSION
FROM RevisedContentDataTable WHERE
SYMBOLIC_PATH_PARENT = N'/Test' AND
SYMBOLIC_NAME = N'HAWK01.GIF'))
WHERE SYMBOLIC_PATH_PARENT = N'/Test' AND SYMBOLIC_NAME = N'HAWK02.GIF' AND VERSION_NUMBER = 1;
END;
It works fine in SQL/Plus or SQL Worksheet and does what it should do ;-)
But when using it via ADO (ODBC Driver) I get the following error:
PLS-00103 found 'string' but expected one of the following: 'string'"}
Any idaes?
Thanx,
Christian
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Answer 1

Pardon my ignorance, but what's the significance of the N'<string>' construction? That's not one I'm familar with.
Justin