ok, back to start point. In my BOM child Item No. as A1 and parent as A:
A1 udf value from Item Master Data "1234" ( I get this query and value in my BOM)
In Production Order when I select the Parent as A, then Row with show me the BOM as setting. (and how now I get the "1234" to all the row with same value, then allow me to copy first row to my Production Order Header)
hope your'll understand what I mean...Thanks!