Change Descriptions using an input list

	The expected format of the input text file for EACH line is:

	Part #
	New Main Desc 
	New Extra Desc#1 
	New Extra Desc#2 
	New Extra Desc#3

	Each field above must be separated (delimited) with a TAB character. 

	A PN and at least the Primary Description is required. Missing or
	empty descriptions do not modify that item's master descriptions.
	However one or more blanks as a description will clear that
	corresponding description.

	A proof run may be run any time concurrently with other users. Even
	an Update run can be done with other users as record locking is
	in place. If another user has a PN pulled up, you will be notified
	and a retry may be done.

	It is highly recommended that a proof run is done first. Also
	it would be prudent to do a BACK UP before an update run.

	Cross-ref PNs optionally may or may not be updated.

	A printout of Exceptions only is made for both the proof
	or Update run, with summary counts of items updated.