Thanks to everyone for sharing your thaughts with me. The issue is solved. It was caused by setting the component HRMSS_PROFILE_SHARED_DATA in configuration of HRMSS_EMP_OVERVIEW_PROFILE as 'invisible element' because we don't use the function of shared data. By setting back the component as visible element the BAdI was called again and calling now the on behalf applications via the launchpad works fine.
