Hi elektrocad,
Its intresting, but your example seems some what confusing, in the 2row there is only one value '5' and in the 3row there are 3 values 2,3,6.
some understanding point is, in the 2row you are taking the 3row (2,3) value and like that in 3row, 4row (5,1).
But in between why 6 came, and in 1row what is VALUE1, VALUE2, SUM is it variables?
can you give another example with extending 2 more rows.
B.Shiva Prasad
InfoPath Dev,
http://www.ggktech.com
India