EFW Support

I'm trying to upgrade my Endian Firewall, I do first in my homologation environment and then try to do in production.

1- I made the Clone my VmWare that is installed and Endian Firewall
2 I changed the Mac from Network cards
3 I rode the command "efw-upgrade"

he is returning the error below

Removing packages (1):
  kernel-PAE

92.3MB of package files are needed. 42.9MB will be used.

Traceback (most recent call last):
  File "/ usr / bin / smart", line 195, in?
    main (sys.argv [1:])
  File "/ usr / bin / smart", line 168, in main
    exitcode = iface.run (opts.command, opts.argv)
  File "/usr/lib/python2.4/site-packages/smart/interface.py", line 53, in run
    result = _command.main (self._ctrl, opts)
  File "/usr/lib/python2.4/site-packages/smart/commands/upgrade.py", line 191, in main
    ctrl.commitTransaction (trans, confirm = confirm)
  File "/usr/lib/python2.4/site-packages/smart/control.py", line 635, in CommitTransaction
    return self.commitChangeSet (trans.getChangeSet (), caching, confirm)
  File "/usr/lib/python2.4/site-packages/smart/control.py", line 683, in commitChangeSet
    caching)
  File "/usr/lib/python2.4/site-packages/smart/control.py", line 801, in fetchPackages
    fetcher.run (what = _ ( "packages"))
  File "/usr/lib/python2.4/site-packages/smart/fetcher.py", line 191, in run
    self.runLocal ()
  File "/usr/lib/python2.4/site-packages/smart/fetcher.py", line 180, in runLocal
    handler.runLocal ()
  File "/usr/lib/python2.4/site-packages/smart/fetcher.py", line 744, in runLocal
    withreason = True)
  File "/usr/lib/python2.4/site-packages/smart/fetcher.py", line 356, in validate
    localpath, withreason = True)
  File "/usr/lib/python2.4/site-packages/smart/cache.py", line 253, in validate
    data = file.read (BLOCKSIZE)
IOError: [Errno 5] Input / output error
ERROR: Error during upgrade