Custom install of RH 7.0 terminated with internal error message.  Source cdroms were created from iso images downloaded from ibiblio 
(metalab) site.  System is a Dell Optiplex GXi P200, SCSI harddrive (2.5 Gb), 96mb RAM, dual 3Com 905B nics, CDROM.

Clean install using older beta CD set (pinstripe RH 6.9.5) and identical custom package selection worked without any errors.

Installer errors messages captured during install:

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//dosc

ToDo object:
(itodo
ToDo
p1
(dp2
S'method'
p3
(iimage
CdromInstallMethod
p4
(dp5
S'progressWindow'
p6

<failed>