acl_dvpp_resnet50例程出现acl.rt.memcpy failed ret=200001错误。

你好，在atlas200DK上运行 pyACL代码样例acl_dvpp_resnet50时候，代码运行报错。

```
发生异常: Exception
acl.rt.memcpy failed ret=200001
  File "/home/HwHiAiUser/acl_execute_model/acl_dvpp_resnet50/acl_util.py", line 6, in check_ret
    raise Exception("{} failed ret={}".format(message, ret))
  File "/home/HwHiAiUser/acl_execute_model/acl_dvpp_resnet50/acl_sample.py", line 92, in _transfer_to_device
    check_ret("acl.rt.memcpy", ret)
  File "/home/HwHiAiUser/acl_execute_model/acl_dvpp_resnet50/acl_sample.py", line 104, in forward
    self._transfer_to_device(img_path, img_dict["dtype"])
  File "/home/HwHiAiUser/acl_execute_model/acl_dvpp_resnet50/acl_sample.py", line 142, in <module>
    sample.forward(img_dict_src)
```
其中，代码的运行日志如下：
```
Using device id:0
model path:./model/resnet50_aipp.om
images path:./data
[Sample] init resource stage:
[Sample] init resource stage success
[Model] The class Model initializes resources:
[Model] create output dataset:
[Model] create output dataset success
[Model] The class Model initializes resources successfully.
[Sample] width:1024 height:683
[Sample] image:./data/dog1_1024_683.jpg
```
使用vs code debug，错误定位在 acl_sample.py 第87行， 在申请内存语句，`acl.rt.memcpy()`后，返回ret代码不为0，导致该错误。debug错误详细信息如图：
![failed 200001](https://images.gitee.com/uploads/images/2021/0118/175023_b4817161_4816026.png "屏幕截图.png")。

atlas200DK的环境变量配置应该没有错误。
![环境变量](https://images.gitee.com/uploads/images/2021/0118/175234_6fa621df_4816026.png "屏幕截图.png")
atlas200DK的硬件版本为 IT21DMDA11

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