I've lost my rpm database (no back-up).
When I try to use up2date I get the following messages:

Retrieving list of all available packages...
Traceback (innermost last):
File "/usr/sbin/up2date", line 859, in ?
main()
File "/usr/sbin/up2date", line 834, in main
sys.exit(batchRun(onlyList, pkgNames, fullUpdate))
File "/usr/sbin/up2date", line 460, in batchRun
printCallback, percentCallback)
File "/usr/share/rhn/up2date/up2date.py", line 1709, in getUpdatedPackageList
progressCallback)
File "/usr/share/rhn/up2date/up2date.py", line 1387, in removeInstalledPackagesFromList
installedPkgList = getInstalledPackageList()
File "/usr/share/rhn/up2date/up2date.py", line 1351, in getInstalledPackageList
key = db.firstkey()
rpm.error: cannot find first entry in database

I would like to copy a small rpm database, that is, the files
Basenames Group Packages Requirename
Conflictname Name Providename Triggername
from somewhere so I can start reconstructing the entire database.
Where can I find them? Or, alternatively, can I construct the file manually? What do the contents of those files look like?

Any help would be much appreciated.
Janneman.

Try running:
rm -f /var/lib/rpm/__db*
rpm --rebuilddb