why missing keys in state_dict ？

[shirley625]

when I run the image_caption_ende_rcst_lstm.py ，there are some errors。
KeyError: 'missing keys in state_dict: "{'rcst_lstm.h2h.bias', 'rcst_lstm.h2h.weight', 'h_2_pre_h.weight', 'rcst_lstm.i2h.bias', 'h_2_pre_h.bias', 'rcst_lstm.i2h.weight'}"'