Please help!

I'm trying to re-install Linux (custom setup option) on a partition. Everything goes wonderful until the

'Formatting / filesystem'

prompt appears. Then a window appears saying 'Anaconda caused a segmentation fault'

The crash-report says:

Traceback (innermost last):

  File "/usr/bin/anaconda", line 438, in ?

    intf.run(todo, test = test)

File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/text.py", line 1030, in run
    rc = apply (step[1](), step[2])
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/text.py", line 507, in __call__
    if todo.doInstall ():
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/todo.py", line 1480, in doInstall
    if self.method.systemMounted (self.fstab, self.instPath, self.hdList.selected()):
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/image.py", line 46, in systemMounted
    self.loopbackFile = mntPoint + fstab.filesystemSpace(mntPoint)[0][0] + \
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/fstab.py", line 258, in filesystemSpace
    space.append((mntpoint, isys.fsSpaceAvailable(topMount + '/' + mntpoint)))
  File "/usr/lib/anaconda/isys.py", line 16, in fsSpaceAvailable
    return _isys.devSpaceFree(fsystem)
SystemError: (2, 'No such file or directory')

Local variables in innermost frame:
fsystem: /mnt/sysimage//mnt/win

ToDo object:
(ito do ToDo p1
(dp2 S'method'p3
(iimage CdromInstallMethod p4
(dp5.S'progressWindow')p6

<failed>


Im stuck!