rpmdb errors

After trying to install Gnucash, and failing miserably, I told Yast to abort the installation. After that, rpm and apt-get failed to install or remove anything. It seems I messed up the rpm database because of that abortion.

I tried rpm --rebuilddb, but the system kept saying there was a lock on the database. So I listened to a suggestion on a forum to reboot, and then tried again. this time rpm --rebuilddb did the trick, and i could install stuff again!