[Moses-support] tree-to-string problem

[Annette Rios]

Hi all

I'm trying to build a tree-to-string system, and I get this error from 
moses_chart:

Exception: moses/Phrase.cpp:214 in void 
Moses::Phrase::CreateFromString(Moses::FactorDirection, const 
std::vector<long unsigned int>&, const StringPiece&, Moses::Word**) 
threw util::Exception because `nextPos == string::npos'.
Incorrect formatting of non-terminal. Should have 2 non-terms, eg. 
[X][X]. Current string: [SP]

The corresponding lines in the phrase table look like this:

[S [AQ asumidos] [cag [sp [SP con] [sn [NP áfrica]]] [conj [CC y]] [SP] 
[sn [NP áfrica]]]] ||| und [X][X] Afrika [X] ||| 0.0874939 0.69856 
0.174988 0.364444 0.606531 ||| 3-0 4-1 5-2 ||| 4 2 2 ||| |||
[S [AQ asumidos] [cag [sp [SP con] [sn [NP áfrica]]] [conj [CC y]] [SP] 
[sn [NP]]]] ||| und [X][X] [X][X] [X] ||| 0.00185172 0.838272 0.174988 
0.865553 0.606531 ||| 3-0 4-1 5-2 ||| 189 2 2 ||| |||
[S [AQ asumidos] [cag [sp [SP con] [sn [NP áfrica]]] [conj [CC y]] [SP] 
[sn]]] ||| und [X][X] [X][X] [X] ||| 0.00185172 0.838272 0.174988 
0.865553 0.606531 ||| 3-0 4-1 5-2 ||| 189 2 2 ||| |||


extracted from this parse:

4    asumidos    asumido    a    AQ 
  gen=m|num=p|postype=qualificative|eagles=AQ0MPP    3    S    _    _
5    con    con    s    SP    postype=preposition|eagles=SPS00  8   
  sp    _    _
6    áfrica    áfrica    n    NP    postype=proper||eagles=NP00000  5   
  sn    _    _
7    y    y    c    CC    postype=coordinating|eagles=CC    8  conj   
  _    _
8    por    por    s    SP    postype=preposition|eagles=SPS00  4   
  cag    _    _
9    áfrica    áfrica    n    NP    postype=proper||eagles=NP00000  8   
  sn    _    _

converted to xml with conll2mosesxml.py:

           <tree label="S">
             <tree label="AQ">asumidos</tree>
             <tree label="cag">
               <tree label="sp">
                 <tree label="SP">con</tree>
                 <tree label="sn">
                   <tree label="NP">&#xE1;frica</tree>
                 </tree>
               </tree>
               <tree label="conj">
                 <tree label="CC">y</tree>
               </tree>
               <tree label="SP">por</tree>
               <tree label="sn">
                 <tree label="NP">&#xE1;frica</tree>
               </tree>
             </tree>


Is there something wrong in my parse trees that causes this?

Best regards

Annette

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