Why does the Kickstart Installation of Red Hat Enterprise Linux 6.5 halt with a traceback error "KeyError: '/dev/sda'" ?

Issue

• Why does the Kickstart Installation of Red Hat Enterprise Linux 6.5 halt with a traceback error "KeyError: '/dev/sda'" ?
• Here is the full traceback.

00:51:12,187 CRITICAL: anaconda 13.21.215 exception report
Traceback (most recent call first):
  File "/usr/lib/anaconda/storage/partitioning.py", line 1066, in allocatePartitions
    disklabel = disklabels[_disk.path]
  File "/usr/lib/anaconda/storage/partitioning.py", line 977, in doPartitioning
    allocatePartitions(storage, disks, partitions, free)
  File "/usr/lib/anaconda/storage/partitioning.py", line 274, in doAutoPartition
    exclusiveDisks=exclusiveDisks)
  File "/usr/lib/anaconda/dispatch.py", line 210, in moveStep
    rc = stepFunc(self.anaconda)
  File "/usr/lib/anaconda/dispatch.py", line 126, in gotoNext
    self.moveStep()
  File "/usr/lib/anaconda/dispatch.py", line 233, in currentStep
    self.gotoNext()
  File "/usr/lib/anaconda/text.py", line 602, in run
    (step, instance) = anaconda.dispatch.currentStep()
  File "/usr/bin/anaconda", line 1131, in <module>
    anaconda.intf.run(anaconda)
KeyError: '/dev/sda'