hi3516a 运行mpp/sample/envc 出错了，求大神指点

我的总内存是512M,  系统占64M， MMZ 占448  load3516a 脚本是配置修改如下
SNS_TYPE=mn34220        # sensor type

mem_total=512;          # 512M, total mem
mem_start=0x80000000;   # phy mem start

os_mem_size=64;         # 64M, os mem
mmz_start=0x84000000;   # mmz start addr
mmz_size=448M;          # 128M, mmz size


/home/mpp/ko #  ./load3516a -a -sensor mn34220  -osmem 64
mmz_start: 0x84000000, mmz_size: 448M
acodec exited!
remove audio
unload ive.ko for Hi3516A...OK!
unload vda.ko ....OK!
unload rc.ko for Hi3516A...OK!
unload jpege.ko for Hi3516A...OK!
unload h264e.ko for Hi3516A...OK!
unload h265e.ko for Hi3516A...OK!
unload chnl.ko for Hi3516A...OK!
unload venc.ko for Hi3516A...OK!
unload vou.ko ....OK!
unload vpss.ko ....OK!
unload viu.ko for Hi3516A...OK!
rmmod: can't unload 'ssp_ad9020': unknown symbol in module, or unknown parameter
Unload vgs.ko for Hi3516A...OK!
unload region.ko ....OK!
ISP Mod Exit!
!!! Module himedia: exit ok
MMZ force removed: PHYS(0x84000000, 0x9FFFFFFF), GFP=0, nBYTES=458752KB,        NAME="anonymous"
Hisilicon Media Memory Zone Manager
Module himedia: init ok
load sys.ko for Hi3516A...OK!
load tde.ko ...OK!
load region.ko ....OK!
load vgs.ko for Hi3516A...OK!
ISP Mod init!
load viu.ko for Hi3516A...OK!
load vpss.ko ....OK!
load vou.ko ....OK!
load hifb.ko OK!
load rc.ko for Hi3516A...OK!
load venc.ko for Hi3516A...OK!
load chnl.ko for Hi3516A...OK!
load h264e.ko for Hi3516A...OK!
load h265e.ko for Hi3516A...OK!
load jpege.ko for Hi3516A...OK!
load vda.ko ....OK!
load ive.ko for Hi3516A...OK!
==== Your input Sensor type is mn34220 ====
*** Board tools : ver0.0.1_20121120 ***
[debug]: {source/utils/cmdshell.c:166}cmdstr:himm
0x200f0050: 0x00000002 --> 0x00000002
[END]
*** Board tools : ver0.0.1_20121120 ***
[debug]: {source/utils/cmdshell.c:166}cmdstr:himm
0x200f0054: 0x0acodec inited!
0000002 --> 0x00000002
[END]
*** Board tools : ver0.0.1_20121120 ***
[debug]: {source/utils/cmdshell.c:166}cmdstr:himm
0x2003002c: 0x00090007 --> 0x00090007
[END]
insert audio
==== Your input Sensor type is mn34220 ====
mipi_init
init phy power successful!
load hi_mipi driver successful!


运行 编码例子  ./sample_venc 0, 报错
open sys: No such file or directory
open err
: No such file or directory
open err
: No such file or directory
[SAMPLE_COMM_SYS_Init]-356: HI_MPI_VB_SetConf failed!, r=A0018010
[SAMPLE_VENC_1080P_CLASSIC]-157: system init failed with -1!
open sys: No such file or directory
open err
: No such file or directory
program exit abnormally!