哪位大侠帮忙看一下这个错误提示是怎么回事啊.错误提示:application execution error (r0002)null object reference at line 6 in clicked of object cb_1of w_kpcx_ts程序原文:if isnull(dw_1.object.bm0000[1]) thenmessagebox('提示','请选择部门!!')elseopensheet(w_kpcx_gl,w_kj,6,layered!)end if运行环境,PB6.5,XP系统帮帮忙,谢谢了

1) 有没有BM0000这个列2) 这个DW有没有数据试试改这样： string ls_bmif dw_1.rowcount() < 1 then messagebox("提示","无数据") returnend ifls_bm = dw_1.getitemstring( 1, "bm0000")if isnull(ls_bm) then messagebox('提示','请选择部门!!') else opensheet(w_kpcx_gl,w_kj,6,layered!) end if