You get this error because you are using this operator from a database other than the wizard. You cannot add a master. to your statements if you are not already in the main database. More generally, you cannot issue instructions that execute a command in a different database than the one you are on.
You can run the instruction without qualifying the database, and it will be launched, as gbn suggests. Or you can connect to master and execute it as is.
Herve rogero
source share