Convert training dataset and training issues

[XDhughie]

hello,
I followed the instructions and run the train.py with python train.py -gpu 0 2>&1 | tee ./log.txt^C. And here is the error info:

F0901 13:01:17.908138 23503 custom_data_layer.cpp:361] Check failed: mdb_env_open(mdb_env_, this->layer_param_.data_param().source().c_str(), 0x20000|0x200000, 0664) == 0 (2 vs. 0) mdb_env_open failed *** Check failure stack trace: *** @ 0x7fdcf54b55cd google::LogMessage::Fail() @ 0x7fdcf54b7433 google::LogMessage::SendToLog() @ 0x7fdcf54b515b google::LogMessage::Flush() @ 0x7fdcf54b7e1e google::LogMessageFatal::~LogMessageFatal() @ 0x7fdcf5ccf423 caffe::CustomDataLayer<>::LayerSetUp() @ 0x7fdcf5d6fada caffe::Net<>::Init() @ 0x7fdcf5d712f1 caffe::Net<>::Net() @ 0x7fdcf5d51d3a caffe::Solver<>::InitTrainNet() @ 0x7fdcf5d53077 caffe::Solver<>::Init() @ 0x7fdcf5d5341a caffe::Solver<>::Solver() @ 0x7fdcf5d3c3a3 caffe::Creator_AdamSolver<>() @ 0x40a6e8 train() @ 0x4075a8 main @ 0x7fdcf3e71830 __libc_start_main @ 0x407d19 _start @ (nil) (unknown)

How to correct this address alignment error?Thank you~ Looking forward for your reply~