The following query:
WITH
CteProductLookup(ProductId, oid)
AS
(
SELECT p.ProductID, p.oid
FROM [dbo].[ME_CatalogProducts] p
always use with statement like ;WITH then you'll never get this error. The WITH command required a ; between it and any previous command, by always using ;WITH you'll never have to remember to do this.
see WITH common_table_expression (Transact-SQL), from the section Guidelines for Creating and Using Common Table Expressions:
When a CTE is used in a statement that is part of a batch, the statement before it must be followed by a semicolon.