[This is preliminary documentation and subject to change.]
This property is set to a value of TRUE by the installer if any volume that is a target of the current install has insufficient disk space to accommodate the proposed installation. If all volumes have sufficient space, the value is FALSE.
This property is valid at any time after the CostInitialize action has been executed. The OutOfDiskSpace property status is dynamically updated any time the total install cost is re-calculated (for example, any time the install state of any feature is changed via the Selection dialog).
Selection resolution actions use this value to cancel an installation and generate a dialog box.