Using Valid Forms
Before you can predict using Predictive Planning, make sure you have a valid form.
In general, a valid form must have the following:
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                        A series axis, containing one or more non-time dimensions, such as Account or Entity. The series axis may not contain Year or Period dimensions. 
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                        A time axis, containing the Year or Period dimensions, or both. The time axis may contain Scenario and Version dimensions. The time axis may not contain other non-time dimensions. 
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                        Scenario and Version dimensions are permitted on the series or time axes, or both. 
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                        The form must not be empty.