Get no output when using marian-decoder

[konglw2023]

I am training a en to zh model with 40m corpus now, the training process is going on. And I want to test the model, so I use marian-decoder to translate several simple sentences, but all of them get no output, could anyone tell me why ?

I use the command like below:

echo "Hello world." | ./marian-decoder -c en-zh-model.npz.decoder.yml -m en-zh-model.npz

yeah, I just trained the model about for 3 hours, is that because the training time too short ? Thank you all.