stackoverflow when training

[gdhzLZ]

hi! when I train the model(train set is 12 cols 50000rows) , and the ffm crashed,the log is :
[------------] xLearn uses 12 threads for training task.
[ ACTION ] Read Problem ...
[------------] First check if the text file has been already converted to binary format.
[------------] Binary file (/Users/liuzhao/Desktop/train.txt.bin) NOT found. Convert text file to binary file.
[------------] First check if the text file has been already converted to binary format.
[------------] Binary file (/Users/liuzhao/Desktop/hh.txt.bin) found. Skip converting text to binary.
[ ERROR ] Feature index is too large (overflow).
I am looking forward to getting the answer.Thanks!!!