Search Failed Error:

Hello ken,
I made this demo for few Hindi words.

I used Ubuntu 14.0.04.

I While run this demo it gives me following output. Can you please tell me why it is giving "Search Failed" error? I am unable to apprehend these errors.

STAT: include config: sample.jconf

pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
sentence1: <s> DIAL NAU </s>
pass1_best: <s> PHONE
sentence1: <s> DIAL TEEN </s>
pass1_best: <s>    
sentence1: <s> DIAL DO </s>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
sentence1: <s> DIAL TEEN </s>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
sentence1: <s> DIAL NAU </s>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
sentence1: <s> DIAL NAU </s>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
sentence1: <s> DIAL TEEN </s>
pass1_best: <s>    
<search failed>
pass1_best: <s>
pass1_best: <s>    
sentence1: <s> PHONE VIMAL </s>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>
pass1_best: <s>    
<search failed>