Assume that you have two measure times, T1 and T2, and T2 is greater than T1. If you calculate (T2-T1) in many iterations, the results might be incorrect. For example, the results might be negative values.
This problem was first fixed in the following cumulative update for SQL Server:
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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