During installation of RHEL6.2 I got anaconda message:

Traceback (most recent call last):
  File "/usr/bin/anaconda", line 632, in <module>
    import dispatch
  File "/usr/lib/anaconda/dispatch.py", line 26, in <module>
    from packages import writeKSConfiguration, turnOnFilesystems
  File "/usr/lib/anaconda/packages.py", line 39, in <module>
    from upgrade import bindMountDevDirectory
  File "/usr/lib/anaconda/upgrade.py", line 35, in <module>
    from storage import findExistingRootDevices, getReleaseString
  File "/usr/lib/anaconda/storage/__init__.py", line 31, in <module>
    import parted
  File "/usr/lib64/python2.6/site-packages/parted/__init__.py", line 52, in <module>
    from partition import Partition
  File "/usr/lib64/python2.6/site-packages/parted/partition.py", line 249, in <module>
    partitionFlag[__flag] = _ped.partition_flag_get_name(__flag)
ValueError: Invalid flag provided.
install exited abnormally [1/1] 
The system will be rebooted when you press Ctrl-C or Ctrl-Alt-Delete.

Thanks

Kamil