Soojeong Kim

@Danielyijun How did you install TensorFlow and horovod? Parallax requires TensorFlow built on the submodule in this repository, and Horovod is also required. You can follow the installation guide here....

What OS are you using?

Did you enable nGraph when configuring TensorFlow build from source?

I'm not sure for NGraphVariable in your error message but it seems related to the nGraph below. If you enter "y" for it, it would be enabled.

You must not enable the nGraph, so "N" or Enter is the right choice. I used an old version, I think it was 0.15.

I think it is highly related to nGraph as in here(https://github.com/NervanaSystems/ngraph-tf/pull/479). Please check your TensorFlow version. If you already have a TF in the machine, you have to uninstall it...

Can you run any code without parallax? If the error occurs again, it's not the parallax issue.

@Sabyasachi18 Did you improve BLEU by increasing src_max_len?