这是SAP的一个Bug，FM方式ALV Grid和Class ALV Grid都会出现，但是ALV List好像没有这个BUG。
在以下几个条件满足的时候就会出现这个问题：
1.字段对应的域Convers. routine = ALPHA，也就是有前导零的字段，比如供应商号、商品号、客户号等。
2.做ALV Fieldcat的时候，没有指定参考表和参考字段。
3.列的表头文本(seltext_s等)比实际显示的数据短。
所以解决问题的时候从2、3两点下手即可。
1 TYPE-POOLS: slis. 2 DATA: gd_fieldcat TYPE slis_t_fieldcat_alv. 3 DATA: sla TYPE slis_layout_alv , 4 i_repid LIKE sy-repid , 5 ls_fieldcat TYPE slis_fieldcat_alv. 6 DATA: BEGIN OF itab OCCURS 0, 7 lifnr LIKE lfa1-lifnr , 8 kunnr LIKE kna1-kunnr , 9 matnr LIKE mara-matnr , 10 bukrs LIKE bsik-bukrs , 11 END OF itab. 12 13 START-OF-SELECTION. 14 itab-lifnr = '0000100047'. 15 itab-kunnr = '0000001006'. 16 itab-bukrs = 'ZB01'. 17 itab-matnr = '000000000001100198'. 18 APPEND itab. 19 20 CLEAR ls_fieldcat . 21 ls_fieldcat-fieldname = 'LIFNR'. 22 ls_fieldcat-seltext_s = 'LI'. 23 ls_fieldcat-seltext_l = 'LILI'. 24 ls_fieldcat-seltext_m = 'LILILI'. 25 ls_fieldcat-ref_fieldname = 'LIFNR'. "|注释 26 ls_fieldcat-ref_tabname = 'LFA1'. "| 27 ls_fieldcat-ddictxt = 'S'. 28 APPEND ls_fieldcat TO gd_fieldcat . 29 30 CLEAR ls_fieldcat . 31 ls_fieldcat-fieldname = 'KUNNR'. 32 ls_fieldcat-seltext_s = 'KU'. 33 ls_fieldcat-ref_fieldname = 'KUNNR'. "|注释 34 ls_fieldcat-ref_tabname = 'KNA1'. "| 35 APPEND ls_fieldcat TO gd_fieldcat . 36 37 CLEAR ls_fieldcat . 38 ls_fieldcat-fieldname = 'BUKRS'. 39 ls_fieldcat-seltext_s = 'BU'. 40 APPEND ls_fieldcat TO gd_fieldcat . 41 42 CLEAR ls_fieldcat . 43 ls_fieldcat-fieldname = 'MATNR'. 44 ls_fieldcat-seltext_s = 'MAT'. 45 ls_fieldcat-ref_fieldname = 'MATNR'. "|注释 46 ls_fieldcat-ref_tabname = 'MAKT'. "| 47 APPEND ls_fieldcat TO gd_fieldcat . 48 49 i_repid = sy-repid. 50 CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY' 51 EXPORTING 52 i_callback_program = i_repid 53 it_fieldcat = gd_fieldcat[] 54 i_save = 'A' 55 is_layout = sla 56 i_callback_user_command = 'USER_COMMAND' 57 TABLES 58 t_outtab = itab 59 EXCEPTIONS 60 program_error = 1 61 OTHERS = 2.