Automatic item addition in a PM notification

Question

Hello there!
I'm trying develop an automatically item addition in a PM notification... But I have to do it during a dialog process (via IW21/22 transaction)!
I mean, when user adds a new item in a notification, some other items must be automatically added, via INTRO push button or, maybe, via some other user action. I've tryed with the following (disappointed) ways:
1.- QQMA0021 Enhacement (QM/PM/SM: Function "User data" in "Goto" menu): It doesn't work because user exit interface is not a table (it's actually a working area): I can only modify the selected item, and I want to add a different one...
2.- QQMA0014 Enhacement (QM/PM/SM: Checks before saving a notification): It works fine when I use IQS0_ADD_ITEM Function Module, but I can't be satisfyed with this solution because, after SAVE process, the system closes the notification visualisation/modification (and it takes the user to IW21/22 initial screen): My client wants to 'remain inside' the transaction, in order to check the added items...
3.- Action Box push button: This is my favourite one (although it doesn't work, either!) because it's the most 'elegant'... I've placed an Action Box Activity in my Notification Screen and I've assigned a Function Module to it (which dequeues the current notification number, calls IQS0_ADD_ITEM Function Module and, finally, enqueues the document again, it makes no sense to directly modify the values of the tables interfaces, because they are set as 'Table Will Not Be Exported').
Anyway, system triggers a short dump (ABAP program SAPLDMEE2):
Quote:
Runtime Error OBJECTS_OBJREF_NOT_ASSIGNED_NO
Exception CX_SY_REF_IS_INITIAL
It's not an interface problem (I've copyed this interface from the dinamic call to the Action Box Activity assigned Function Module). Furthermore, if I asterisk my Function Module code, system doesn't dump at all (but it obviously doesn't work as it's supossed to!): That's why I think I won't reach a customizing solution (I mean, this dump is not raised because of the customizing, I guess: It seems to be a because of the Function Module inserted code)...
I've set the Documentation fiield of my Action Box Activity customizing as 'N None'.
Can anyone suggest me any new idea? I'll welcome each and every suggestion!
Thanks in advance, greetings from Locarno (Switzerland)!

Answer 1

Hi Mutale,
I see some confusion in concept about Catalog Code Tabs.
What you referred in the initial post are the Sub-Tabs inside a Catalogs & codes Main tab of a Notification.
What you have referred to in the later post are the Main Tabs of Catalogs. like this
The Difference
The Sub-Tabs of Catalogs will display information corresponding to the line item of the first tab (Object part & Damage Tab). Here you are not free to enter a Cause, Task or Activity without filling an Item line (Object part or Damage)
The Main Tabs are independent Catalog Tabs. You can maintain the line items here independently  without any conditions as above.
Lastly:
I hope your initial query has been cleared by looking into the picture, that you can have a separate Causes Tab.
In configuration, you need to have tab 10/Tab16 for this.
Best of Luck
Jogeswara Rao K