How to update a Master table

[Jaime A]

Hello,

 I want to process a transaction file and update the master file. The
   transaction file comes in with several transaction types which could be
add
   (if not in master), update (if in master) or delete. There might be
multiple update transaction which could depend on previous updates. So the
processing
   should be done in a certain sequence based on how the events happening. I
   know that if I use "Access Trans file link to Master File then do an
output
   at the end will give me an error as it will complain that I am accessing
a
   record that has been updated".  Please could somebody out there expert in
   Powerhouse's QTP suggests how to code this program so I could do an
   add/update/delete (not in that order) without the error message?
   Thanks in advance,
   jamie
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