我用这段代码生成图纸文件为何出错呢？

pangpang8

编译能通过，但是运行后就出错

                    char *drawingname="Process";
        double size[2]={400,400};
        UF_DRAW_info_t drawing_info;
        drawing_info.size_state=UF_DRAW_CUSTOM_SIZE;
        drawing_info.size.custom_size[0]=size[0];
        drawing_info.size.custom_size[1]=size[1];
        drawing_info.drawing_scale=1.0;
        drawing_info.units=UF_PART_METRIC;
        drawing_info.projection_angle=UF_DRAW_THIRD_ANGLE_PROJECTION;
       
        tag_t *sheet_tag;
        UF_DRAW_create_drawing(drawingname,&drawing_info,sheet_tag);

sualpha

sualpha

pangpang8