OK, after several readings, I have solved the problem for pdf (I wasnt the only one apparenly and it was just the problem of the option line given to the binary)
I am now stucked on a similar problem, with "word" documents (I use Doc2txt for the text conversion) and whenever I try to index those documents, indexation is not done, but it remains :
a 98183891.tmp file in the admin/temp directory and a 98183892.txt file in the admin directory. By the way, this last one is the right text translation of the original Word document. The one in the temp directory contains only one line saying something like :
C:Web\www\phpdig\admin\temp\98183891.tmp --> "" "" \admin\98183892.txt
Has s.o experienced this ?
Thanks