Historic data gone/missing!

Hi all,

We are running Opmanager for over a year now without a lot of trouble, but this morning when I wanted to open the statistics for a server I received:

Status Message
Unable to find the object: Hostname

This was the case on all of our devices. So I figured, maybe the application just needed to be rebooted, so I restarted the services. After that when logging in I received some corrupt tables so I ran repairdb.bat.
Now I was able to log in again and I was able to open a device page without the status message. However, when opening a monitor ALL of the collected data seems to be either missing or gone!

Is it possible to get it back, because I really need the historic data?

Thanks in advance