Hi,

this error is not that unusual when you train an n-gram model over part of
speech tags. These tags are all very frequent, which then causes Kneser-Ney
smoothing to fail.

You can address this by not using Kneser Ney smoothing for such models.
This can be done in EMS by adding the line

settings = "-interpolate -unk"

to the [LM:...] section where you define the n-gram model over tags.

-phi



On Thu, Sep 12, 2013 at 10:27 PM, karan sharma
<[email protected]>wrote:

>
> Hey,
> I am using EMS for factored model.I am getting this error "step
> LM:toy:train crashed".
>
> STDERR file:
> one of required KneserNey count-of-counts is zero
> error in discount estimator for order 1
>
> Can anyone help with it?
>
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