XFS library could not be initalized

["Florian Lindner" <exchange@xxxxxx>]

Hello,
I get this error message from some XFS utitlities.
For example:

xfs_check /dev/hda2 says:

hda2 contains a mounted filesystem.
fatal error: XFS library could not be initalized.

Is this the normal behaviour when running xfs_check on a mounted filesystem?
I've used Redhat 7.3 with the SGI installer. If this is abnormal, how to fix
it?
If it's normal, is there any possibility to check a mounted XFS filesystem
for errors or is there anything like a bootdisk provided with the essential
XFS utils to check my root partition.
Thx,
Florian