Input for my Pivot Table is an entity with 3 attributes: Period, Time and Usage.
Type of attribute Usage = Decimal.
In the configuration of the PivotDataWidget X-Axis attribute = Period and Y-axis attributes = Time.
As Cell Value Attribute I like to select Usage.
However only attributes of type Currency, Date and time, Integer, Long, Enumeration, String are allowed.
(if I change the type of attribute Usage to Integer there is no error and Pivot Table can be created)