Hi, I tried to merge two internal tables (itab_1 & 2) into another one (itab_3). They have the same type. Here the coding: LOOP AT ITAB_2. READ TABLE ITAB_1 WITH KEY: PERNR = ITAB_2-PERNR, DAT2 = ITAB_2-DAT1. IF SY-SUBRC = 0. ITAB_3-PERN...