caffe之Check failed: !lines_.empty() File is empty错误

I0813 20:39:10.270206 38816 layer_factory.hpp:77] Creating layer ImageData1
I0813 20:39:10.272202 38816 net.cpp:100] Creating Layer ImageData1
I0813 20:39:10.272202 38816 net.cpp:418] ImageData1 -> ImageData1
I0813 20:39:10.273198 38816 net.cpp:418] ImageData1 -> ImageData2
I0813 20:39:10.273198 38816 image_data_layer.cpp:38] Opening file ./mnist/train/test.txt
F0813 20:39:10.274196 38816 image_data_layer.cpp:49] Check failed: !lines_.empty() File is empty
*** Check failure stack trace: ***

原因:source不是绝对路径，改成绝对路径就行了