MB_MIGO_BADI - Not able to bring data to screen fields

Question

Hi there,
I'm trying to add a new tab in the item level in the MIGO screen. In the new tab, I am placing a custom screen with some fields containing purchase order details. I am using the BADI MB_MIGO_BADI for this task. Now I'm able create a new tab and place the screen inside. But I'm not able to place bring the data to the screen fields in the new tab. I'm writing the code for including the screen in the method PBO_DETAIL. And this method do not have any parameters of purchase order details.
Have any one of you came across such situation??? If any one of can give a solution to work out this problem, it will be very helpful.

Answer 1

Under PAI method declare the field to u2018Xu2019. 
Under the line modify method declare a flag and set to u2018Xu2019 checking for material document number by which we can set the fields to be in display mode when we open MIGO for display of material document created after doing goods receipt.
Under the POST_DOCUMENT method write the code for appending the value to Z table along with the values of the line item (In this case production order number, material, u2026u2026.). For these values to be available here in this method use the memory concept u201CExport to memory idu201D in the method LINE_MODIFY. 
In order to do any validations to the custom fields, go to transaction SE80 and mention the program Name created and in PROCESS ON VALUE_REQUEST create a module and provide the validations required for those custom Fields.
In order to make the fields to be in display mode during the display of material document, create a module under PBO and import the flag value and the production order number details in the method LINE_MODIFY and if that flag = u2018Xu2019, use  
LOOP AT SCREEN.
IF SCREEN-NAME = 'XXXXXX'.
SCREEN-INPUT = '0'.
MODIFY SCREEN.
ENDIF.
ENDLOOP.Retrieve the values from the Z table matching the key field (production order number) and pass the value of the custom field on to the screen. 
Thanks,
Shailaja Ainala.