when run train.py have a error, Expect 40 fields but have 39 in record 0,how to solve it?

[withDataman]

INFO:tensorflow:Starting evaluation ……
tensorflow.python.framework.errors_impl.InvalidArgumentError: Expect 40 fields but have 39 in record 0

[Lapis-Hong]

I did not meet this error in my local test. This error means that your data only have 39 fields in some line, check your data format such as separator may work.