Hi Chandra,
I have got similar requirement in which Basic Start Date and Basic Start Time were changing,I have gone through this thread But that PERFORM STATUS_UPDATE in PROGRAM SAPLBSVA is not working for me, May be i have put in Wrong Place, i have put this after BAPI_ALM_NOTIF_CREATE it didn't work, then i have put after BAPI_ALM_NOTIF_SAVE then also it didn't work, Shall I put after BAPI_TRANSACTION_COMMIT.