To refer to a specific cell, you use an index after the column name. 

So if you are writing a formula for the val3 column and you want to get the value of subrow2Val1, you would do something like this:

"[../Band 1/Column 0(1)]"

Column 0 in this case is the first column in Band 1. The "(1)" refers to row number 1 - the second row in the list.

So your whole formula might look something like this:

"IF ([../Band 1/Column 0(1)] = 10

     , [../Band 1/Column 2(1)]

     , 0)";

If the first cell in the second child row is 10, then use the value from the third cell in the second child row; otherwise, use 0.

thanks for your anwser,

but I don't want the sum i need to choose a particular cell in child row and copy automaticly this cell value on parent row.

val1 val2 val3

       subRow1Val1  subRow1Val2 subRow1Val3

       subRow2Val1  subRow2Val2 subRow2Val3

on this sample i want to replace val3 by "subRow2val3" if subRow2Val1=10, With formula to export the cell formula on excel

ps sorry for my english