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Set the active plant as desired via Drawing Manager.
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Open the desired drawing.
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Open the Engineering Data Editor and select Instrument Loop.
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Select an instrument loop from the list.
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In the Properties window, select Calculation .
All instruments associated with this loop are highlighted and placed in a select set that can be used for possible modification.
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The following error message displays if more than one instrument loop is selected in the Properties window:
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The following error message displays if the selected instrument loop is not associated with any items:
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The following error message displays if the selected instrument loop is associated with items but none of those items are in the current drawing: