The new rebuild-gcj-db will fail (I think) if the full list of .db files cannot fit on one Linux command line. The following patch, which I just tested, fixes this: --- rebuild-gcj-db.orig 2005-07-09 10:07:00.000000000 +0100 +++ rebuild-gcj-db 2005-07-09 10:07:19.000000000 +0100 @@ -17,4 +17,4 @@ dirname $dbLocation | xargs mkdir -p /usr/bin/gcj-dbtool -n $dbLocation 64 find $dbLocation.d /usr/lib/gcj -name '*.db' -print0 | \ - xargs -0 /usr/bin/gcj-dbtool -m $dbLocation $dbLocation + /usr/bin/gcj-dbtool -0 -m $dbLocation $dbLocation