For more convenient, I ask the question again, but in this Mailing List.
Sorry for those who already read it.

I make this query :
../swish-e -f Katia.idx -w NIC=0017 -p NAF NIC

Here is the XML file :

<ROOT>

<COUNTRY>
<nic>0017</nic>
<naf>china</naf>
</COUNTRY>

<COUNTRY>
<nic>0013</nic>
<naf>japan</naf>
</COUNTRY>

</ROOT>


I get this result :

1000 ./test/005403.txt "005403.txt" 57 1 "japan" "0013"

And the good result shall be :

1000 ./test/005403.txt "005403.txt" 57 1 "china" "0017"

Allways the last information in the file is printed
and not the RIGHT information.