Alter user defined type in SQL Server

Question

I created few user defined types in my database as below

CREATE TYPE [dbo].[StringID] FROM [nvarchar](20) NOT NULL

and assigned them to vario

Answer 1

As devio says there is no way to simply edit a UDT if it's in use.

A work-round through SMS that worked for me was to generate a create script and make the appropriate changes; rename the existing UDT; run the create script; recompile the related sprocs and drop the renamed version.