As a recursive ProDataSet FILL is proceeding, it creates clones of the relevant buffers, relations, queries and data-sources for each level of recursion. As a new record is added to the ProDataSet, it fires FILL events on the recursed, cloned buffer. From inside the event handler, you may want to see previous iterations of the buffer, its parent, grandparent, great-grandparent, and so on. NUM-ITERATIONS indicates the level of the recursion.
If the buffer object handle does not point to a ProDataSet temp-table or is not part of a recursive data-relation, NUM-ITERATIONS returns the Unknown value (?).
