Thanks, Sergey
This sure takes the shine off user defined data types.

>>Is there a way to change a user defined data type? I have a data type defined as nchar(10) that I want to make nchar(12). SQL Server complains that the data type is in use (which it is). I tried EM but it does not let me change the length either.
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>There's a way but it's quite involved. See mskb #327123 HOW TO: Change the Owner of a User-Defined Data Type That Is in Use in SQL Server 2000.