Well, maybe that's the issue. I don't really know ADO.NET either - the developers are having a difficult time accessing the stored procedure. I am new to Oracle but have done much development in SQL Server. In SQL Server, since there is no array data type or anything to pass in multiple values into one parameter, I use a comma separated list and use a function to parse the list. I was doing the same in this stored procedure. Are there some good references out there for passing an array as an input parameter in PL-SQL?? Thanks so much!