I just tried to run fsrecover on my Data.fs and got this error:

root@server167:zope/instance2/var (145) /usr/local/zope/py235/bin/python /usr/local/zope/278/lib/python/ZODB/fsrecover.py Data.fs Data.fs.recover
Traceback (most recent call last):
  File "/usr/local/zope/278/lib/python/ZODB/fsrecover.py", line 80, in ?
    import ZODB
ImportError: No module named ZODB

Huh? What do here?
TIA,
Nancy