Custom Subscreen in Service Master AC01 not invoked

Question

Defined custom subscreen(SAPLXBAS 8100) for service master AC01. User Exit is activated , however the line of code inthe main screen which calls the subscreen is not being called at runtime. Details are as follows
ECC6.0
UserExit  : SRVASMD
Calling screen      No.      Area         Called screen     No.
SAPLBAS0         0300    ZUSATZ    SAPLXBAS        8100
this is the line which is being ignored while executing the transaction ac01
CALL CUSTOMER-SUBSCREEN ZUSATZ INCLUDING 'SAPLXBAS' '8100'.
Any inputs appreciated and points would be awarded

Answer 1

Hi,
Here is step by step to implement an screen exit
Screen exits add fields to screens in R/3 applications. SAP creates screen exits by placing special subscreen areas on a standard R/3 screen and calling a customer subscreen from the standard screen’s flow logic.
the tcode is cmod...
1.From the main screen of the Project management transaction, proceed as follows:
Select Enhancement components and choose Change.
2.Choose Edit component.
3.Choose the screen exit and double click on it
4.Create your subscreen using the Screen Painter.
5.Design your screen to be added to the standard screen and activate the particular screen and return back to the flow logic .
6.Choose the PAI and PBO to write down the logic.
7.Generate your screen and choose Back (the green arrow) to return to the Project management transaction.
8.Go to the transaction ME22 to view the customer defined screen exit.
9.Enter the purchase order number and press Enter.
10.Go to the menu header --> Details.
11.Purchase number is visible on the standard screen
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Regards