Cannot find the user '', because it does not exist or you do not have permission

Question

I am trying to add permissions to a Store procedure for a user using this query,

USE [MyDatabaseName]
GO

GRANT EXEC ON [dbo].[StoreProcedureName] TO [UserNa         


        

Answer 1

I just encountered the same problem.

Make sure there is an user mapping for your login in the master table. No database role memberships are required, just tick 'Map' for the database master under 'User Mapping' in the properties for the login 'UserName'.