AW OBJECT OLD NUMBER
Object number of the object to be changed (using aw_object_change).
This attribute is only referenced by the aw_object_change method, and is only applicable when AW_OBJECT_ID is set to zero. Setting AW_OBJECT_ID to zero indicates that the object be identified using AW_OBJECT_OLD_X, AW_OBJECT_OLD_Z and AW_OBJECT_OLD_NUMBER.
For a more detailed discussion of objects in Activeworlds, see Property.