I got error while opening database properties

Cause

=====

for this errors two reasons

1)one is Database Owner is null

2)Original DBO Login was removed recently

Resolution

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first i checked the database owners

this is for all db's in a instace

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SELECT name,SUSER_SNAME(owner_sid) as DB_Owner

FROM sys.databases

out put

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I found probably Database Owner is NUll..

Then i changed Database Owner to SA

USE DB_Name

go

EXEC sp_changedbowner 'sa'

after that i am able to open the Database Properties