Problem in screen whilw calling it from report

Question

Hi friends,
I have created a report which contains a selection screen with following fields.
Selection screen
all are slect optins.
VBELN
KUNNR
MATNR
now when i enter the values in these slection screen and execute it,
it basically calls a screen 100 ( module pool program ) and displays the value of that particular sales order  number in the screen 100 and that screen contians a table control which basically displays the line items(POSNR) of that particular VBELN.
now my problem is when the ist time iam giving the value of VBELN as 1000 in the report select option and executing.
its displyaing the value of VBELN in screen and posnr in the tbale control.
now when i go back to the selection screen from the screen 100 and if i leave the VBELN field empty and execute it. it has to display all the posnr of all the sales order number.
but it is displaying the previous vbeln 1000 .
How can i clear that.
Regards,
Priyanka.

Answer 1

You can use an alternate way to lonk a Selection screen and a module pool screen as mentioned below:
Let 1000 be the screen on which you want to put Range button.
Make a subscreen area on it. Let it be named as sub_area.
Now make a selection screen in your program.
SELECTION-SCREEN BEGIN OF SCREEN 100 AS SUBSCREEN.
SELECT-OPTIONS R_PERNR FOR PERNR-PERNR.
SELECTION-SCREEN END OF SCREEN.
Now in screen 1000 flow logic, we can call the selection screen in the sub screen area defined.
In PBO of 1000
CALL SUBSCREEN SUB_AREA INCLUDING SY-REPID '0100'.
Now, code in AT SELECTION-SCREEN OUTPUT event will be exe.
In PAI of 1000
CALL SUBSCREEN SA_SS. as the first line after PAI
Now, AT SELECTION-SCREEN event will be exe.
Using above method u will get the functionality of Select-Options of Selection Screen on a Module Pool Screen.