新手求帮助。 关于PAI平台 mnist 案例bug

bug如下：
[1] Instance 2017101406545583gxkvt2i8 Failed.
[1] FAILED: Failed 20171014145457bc821bcc_a0a9_4ef4_8081_7a55c67a3111:ODPS-1202005:Algo Job Failed-System Error-Failed to execute system command.(1)
DMS logs: Please try the following steps:1. Read the error messages carefully to see if you can understand it;2. try to rerun the job first;3. Check the F&Q ( https://help.aliyun.com/document_detail/30352.html );
[1] Execute Odpscmd Failed!
[1] [2017-10-14 14:56:29] ERROR: run subjob: #1[odpscmd] failed!

我在这里：https://help.aliyun.com/document_detail/50654.html?spm=5176.doc49571.2.19.ZqQfIo下载的代码和数据集。

这是定义的模型：

不知道为什么跑不通。