I let SSMS generate the script to run a stored proc, and I get this:

DECLARE @rc int

DECLARE @DDVersion varchar(20)

-- TODO: Set parameter values here.

EXECUTE @rc = [cidne2110].[dbo].[spDDAddFixAll]

@DDVersion

GO

I edit the code like this, then execute it:

DECLARE @rc int

DECLARE @DDVersion varchar(20) = '2.1.10'

-- TODO: Set parameter values here.

EXECUTE @rc = [cidne2110].[dbo].[spDDAddFixAll]

@DDVersion

GO

This would be the same thing:

EXECUTE dbo.spDDAddFixAll '2.1.10'

GO