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Tag calculation happens in the order of left to right and top to bottom.


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But what if this 'Total' line actually appeared ABOVE the 'Detail' Lines. In that case, the Total will be calculated before the Tags that provide the Input, and they will be zero because they have not been calculated yet! That's why we have Execution Iterations. Any Tags may be listed for higher Execution Iterations. So if Tag 2, in the normal sequence, is calculated before Tag 1, but Tag 2 needs Tag 1 to be already calculated, then we can raise the Execution Iteration of Tag 2 to 2.With every Execution Iteration, only the Tags listed for that Iteration will be calculated.

 


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For example, Tag 24 relies on input from Tag 23. So, if in the left-to-right and top-to-bottom scenario, Tag 24 happens before Tag 23, then in that case we need to ensure that Tag 24 is calculated LATER, for example in Calculation round 2.


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We can manually edit the Calculation Round, called the Execution Iteration.


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The Help on this Field also explains about Execution Iterations.


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Execution Iteration can also be raised for many Tags with the Selection and Automatic functions.


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The Automatic function raises all Tags that depend on other Tags.


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Bear in mind though, that there may still be cases of Tags that depend on Others that also depend on Others, in which case we still need to raise some of them Manually or by Selection.