Nmt: Failed precondition: HashTable has different value for same key. Key the has 9 and trying to add value 25

[CuZn13]

What is the cause of this problem? I am training Chinese to English

[chaoyu0804]

You may have a word that exits in the vocabulary file more than once.

[ssokhey]

It is not the case in my problem. I have checked the vocabulary.
Is there anything else that may have caused this?

[tslater]

@ssokhey Same here. Have you found what is causing the issue? This is driving me crazy.

[wxs19920926]

这个问题有解决吗？

[ssokhey]

@tslater I forgot to add the following at the start of vocab files for both languages.

<unk>
<s>
</s>

It worked for me after this.

[XinDongol]

@tslater I forgot to add the following at the start of vocab files for both languages.

<unk>
<s>
</s>

It worked for me after this.

Why we have to add these three lines?