Update rule not working with high data load.

Question

Hi all,
i have a problem with a update rule: it's an update loop in a dso, in the start routine i do 3 select for all entries in data-package on the active table of another structure; then i read those table to update some values in my update rule.
I did some test and it seemed to work well (i tryed for example just for a plant) but when i launched it for all the records in the dso the result was differente and, for the same plant, the values where not updated correctly (they were blank).
Now the routine is really the same so it sound strange to me that launching the infopackage without filters i can't get the same correct result of my previous test but i was wondering what could be the reason of this error...
Anyone can help?
The start routine is this:
  REFRESH i_tab.
  SELECT field1 field2 field3
    INTO TABLE i_tab
    FROM target_dso
    FOR ALL ENTRIES IN DATA_PACKAGE
    WHERE deliv_numb = DATA_PACKAGE-deliv_numb
      AND deliv_item = DATA_PACKAGE-deliv_item
      AND act_gi_dte <> l_blank_date.
then i read this table in the other routines...

Answer 1

It is hard to say.  What does the update rule look like?
after the read statement, you could check the return code.  If it is not zero, go into an infinite loop, and debug it via SM37.
read table....
IF sy-subrc <> 0.
  WHILE 1 = 1.
    "debug in SM37.
  ENDWHILE.
ENDIF.