Determine who or what changed the value in a data area

Hi everyone
Before I forget we are on V5r4

Without going into too much detail, Is there any way to determine who or what changed the value of a data area?
We had a problem which was due to a data area NOT being the expected value
This has now happened twice in the past week and these programs have remained unchanged in years
We have HAWKEYE and nothing appears out of the ordinary when I analyze this data area within HAWKEYE
Alan Shore
E-mail : ASHORE@xxxxxxxx
Phone [O] : (631) 200-5019
Phone [C] : (631) 880-8640


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