Database Diagram Support Objects cannot be Installed … no valid owner

Question

I tried to create a database diagramm with SQL Server 2008, but an error occurs:

Database diagram support objects cannot be installed because this dat

Answer 1

I had the same problem.
I wanted to view my diagram, which I created the same day at work, at home. But I couldn't because of this message.
I found out that the owner of the database was the user of my computer -as expected. but since the computer is in the company's domain, and I am not connected to the company's network, the database couldn't resolve the owner.

So what I did is change the owner to a local user and it worked!!
Hope this helps someone.

You change the user by right-click on the database, properties, files, owner

Answer 2

Only need to execute it in query editor ALTER AUTHORIZATION ON DATABASE::YourDatabase TO [domain\account];

Answer 3

USE [ECMIS]
GO
EXEC dbo.sp_changedbowner @loginame = N'sa', @map = false
GO

It works.

Answer 4

This fixed it for me. It sets the owner found under the 'files' section of the database properties window, and is as scripted by management studio.

USE [your_db_name]
GO
EXEC dbo.sp_changedbowner @loginame = N'sa', @map = false
GO

According to the sp_changedbowner documentation this is deprecated now.

Based on Israel's answer. Aaron's answer is the non-deprecated variation of this.

Answer 5

you must enter as administrator right click to microsofft sql server management studio and run as admin

Answer 6

The real problem is that the default owner(dbo) doesn't have a login mapped to it at all.As I tried to map the sa login to the database owner I received another error stating "User,group, or role 'dbo' already exists...".However if you try this code it will actually works :

EXEC sp_dbcmptlevel 'yourDB', '90';

go

ALTER AUTHORIZATION ON DATABASE::yourDB TO "yourLogin"

go

use [yourDB]

go

EXECUTE AS USER = N'dbo' REVERT

go