Originally posted by OracleDoc
The one thing you have to remember with MV's is that they can only be manipulated by the owner. So, if you want to refresh the job or run it again log in as that user.

I'm not saying that you weren't but, I've seen it in the past where people have logged into OEM as a different user and tried to "play" with the MV's and couldn't understand why they couldn't.
Yes , I did , there is MV logs in the master site