[Help] Multiple Selection at Select Options.

Question

People, I've coded following Select Options:
DATA: g_created TYPE zapomatxref-erdat,
            g_modif   TYPE zapomatxref-aedat,
            g_matnr   TYPE zapomatxref-pr1_material.
SELECT-OPTIONS: s_creat FOR g_created,
                               s_modif FOR g_modif,
                               s_matnr FOR g_matnr OBLIGATORY.
Thing is, when I execute the program and hit the Multiple Selection, an error pops up saying "Fill in all required fields".
I know it goes through PBO validating that OBLIGATORY so I can't enter the multiple selection screen.. But is there a way to enter the multiple selection screen without changing the OBLIGATORY adition ?
Thanks in advance.
PS: This is an executable program, not module pool. Also I want to enter Mutliple Selection screen without filling s_matnr.

Answer 1

Guys, solved the problem. You have to remove the OBLIGATORY addition and set the following code.
("Percentage symbol" below is the traditional percentage centessimal symbol we know, the mozilla wont let me insert it...)
TOP Include:
CONSTANTS: c_per002     TYPE c    VALUE '(percentage symbol)002'.
MAIN PROGRAM:
AT SELECTION-SCREEN ON s_matnr.
  IF sy-ucomm NE c_per002.
    IF s_matnr[] IS INITIAL.
      MESSAGE e025(ycapo).
    ENDIF.
  ENDIF.
START-OF-SELECTION.
PS: c_per002 comes to be the sy-ucomm value when hitting Multiple Selection Button at Selection Screen.. As any action validates the whole screen, you just set a clause when you don't want to validate if sy-ucomm not equals (different from) c_per002.