LEAVE TO LIST PROCESSING

[Former Member]

Hello,

I have a requirement to display a basic list on clicking a button on a screen and then from list on clicking a button i have to go to another screen. Something similar to VERSION COMPARISON feature available in normal abap workbench....

My problem is when i click 'BACK' or 'CANCEL' or 'EXIT' on my list screen i am not going back instead i am going to next screen.

Input Screen-1 has SHOW_VERSION BUTTON . on clicking it-> display a list output that shows all versions and this list output screen shuld have a button(COMPARE) on its toolbar-> when i click on this-- i have to open another screen that shows comparison result....

So i used three screen (0001,0002 and 0003)... And in PBO of 0002, i gave below code

SET PF-STATUS 'STATUS_0002'. ---> i created COMPARE button with function_code = COMPARE

PERFORM disp_version_list.

LEAVE TO LIST-PROCESSING AND RETURN TO SCREEN '0003'.

LEAVE SCREEN.

and in the event AT_USER_COMMAND

WHEN 'COMPARE'.

LEAVE LIST-PROCESSING.

So when i click COMPARE i go to screen-0003. But when i click BACK i use CALL SCREEN '0002'. and in screen'0002' if i click back its again going back to 0003.

Please help me out.

Regards, Linda

[Former Member]

Hi,

Check your OK_CODE in all the screens . check if the ok code is cleared while leaving to other screens.

Regards,

Srini.

[Former Member]

Hello Srini & Nitwick,

I checked the ok_codes. Unfortunately on coming back from 0003 to 0002. and again pressing back on 0002. The PBO of 0002 itself is getting triggered again.. Its not going to PAI of 0002.... Y it is so...? is it due to list processing?

Please help.

Linda.

Edited by: Linda Thomas on Dec 16, 2010 8:46 AM

[Former Member]

Hi,

Please debug and check your code. May be, you are calling the screen 0003 somewhere when you press BACK on screen 0002.

[Former Member]

Hi,

Have you actually coded the logic while pressing the BACK button?

Please check your sy-ucomm values in all the screens during navigation.

[Former Member]

Hi Thomas,

you can try with the following code and change according to your code.Before that you have set the PF-STATUS for the screens and declare the Function Code and Function type accordingly.

case sy-ucomm.

when 'BACK'.

clear: p_field1,p_field2. " screen fields in the 0100 screen number

leave to screen '0100'. " previous screen number

when 'EXIT'.

leave program. " Function type must be declared with ' E' in PF-STATUS

endcase. " CASE sy-ucomm.

Regards,

Suvajit.

[ravi_lanjewar]

Hi,

Write the following code before the leave to leave to list processing statement.

clear ok_code.
ok_code = sy-ucomm.
clear sy-ucomm.
case ok_code.
when 'COMPARE'
     leave to list processing and return to screen '0003'.
     write 'Press back to go previous screen'.
endcase.