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Select the Subscription in the tree on the left.
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Right-click to show the Actions menu, or click Actions for Selected Row, then click Make predictions.
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A pop up box will ask you how many items you want to predict. Enter the number, and click OK.
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A confirmation message will appear. Click OK.
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To view the predicted issues, select a Subscription from the tree on the left, then click the Issuances tab in the panel on the right.