[Libguestfs] febootstrap-supermin-helper: ext2fs_read_inode: Illegal inode number

hi list, I try to get libguestfs running on SLES11SP1 .... or at least basic guestfish functionality and run into a serious problem: febootstrap-supermin-helper --verbose -f ext2 /usr/lib64/guestfs/supermin.d x86_64 /tmp/guestfs.MUqge5/kernel /tmp/guestfs.MUqge5/initrd /tmp/guestfs.MUqge5/root supermin helper [00000ms] whitelist = (not specified), host_cpu = x86_64, kernel = /tmp/guestfs.MUqge5/kernel, initrd = /tmp/guestfs.MUqge5/initrd, appliance = /tmp/guestfs.MUqge5/root supermin helper [00000ms] inputs[0] = /usr/lib64/guestfs/supermin.d checking modpath /lib/modules/2.6.32.23-0.3-default is a directory picked vmlinuz-2.6.32.23-0.3-default because modpath /lib/modules/2.6.32.23-0.3-default exists supermin helper [00009ms] finished creating kernel supermin helper [01107ms] finished mke2fs supermin helper [01108ms] visiting /usr/lib64/guestfs/supermin.d supermin helper [01108ms] visiting /usr/lib64/guestfs/supermin.d/base.img supermin helper [01221ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img supermin helper [01224ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles febootstrap-supermin-helper: ext2fs_read_inode: Illegal inode number I attach the content of supermin.d ... maybe someone has an idea whats going wrong. thx & Regards Andreas