Dear Pratyush,

 the format of the LM metafile 
(/home/pbanerjee/smt-work/incremental_LM_Exp/mt/l_models/interp.wt.fina)
is the following


LMINTERPOLATION 2
0.439053 /home/pbanerjee/smt-work/incremental_LM_Exp/mt/l_models/forum.lm
0.560947 /home/pbanerjee/smt-work/incremental_LM_Exp/mt/l_models/tm.lm

Note the keyword     LMINTERPOLATION

best,
Nicola


On Apr 3, 2012, at 4:44 PM, Pratyush Banerjee wrote:

Hi,

I am trying to use interpolated language models (prepared using IRSTLM - v 
5.50.01) directly in Moses..
I use interpolate-lm to learn weights on a devset but am not sure how to pass 
the configuration file to Moses directly..

I learnt from one of Nicola's mails (in the IRSTLM mailing list) that it could 
directly be passed on to the Moses decoder...
However, when i try the following in my moses.ini file :

[lmodel-file]
1 0 5 /home/pbanerjee/smt-work/incremental_LM_Exp/mt/l_models/interp.wt.final

The language models are not loaded... I get the following lines in my log 
file...

Start loading LanguageModel 
/home/pbanerjee/smt-work/incremental_LM_Exp/mt/l_models/interp.wt.final : 
[1.000] seconds
In LanguageModelIRST::Load: nGramOrder = 5
Loading LM file (no MAP)
2
loadtxt()
done
starting to use OOV words [<unk>]
OOV code is 0
OOV code is 0
IRST: m_unknownId=0

The content of my interpolation config file is as below...

2
0.439053 /home/pbanerjee/smt-work/incremental_LM_Exp/mt/l_models/forum.lm
0.560947 /home/pbanerjee/smt-work/incremental_LM_Exp/mt/l_models/tm.lm

Could some one please let me know how to pass a interpolated configuration file 
to be directly used by Moses ?

Thanks and Regards,

Pratyush
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