Yes, it was very helpful and understood in my context. thanks again Chris.

So if I assume correct the approach will be like this: * Uninstall OBIEE * Uninstall XE DB * install 12c DB * install OBIEE right Christian?

Thanks Andris for your assitance. So my strategy for backup will be: Take a exp from the XE db uninstall XE db install 12c db imp the exported dump But in between these process I am not sure how my installed OBIEE 12c will be impacted, as the metadata is already existing in XE db. My intention is to upgrage the DB without…