thank you xavier for answering me so quickly!

I'm afraid Xh_uninit is called every time I ask httrack to parse a file.
Indeed, when I want to parse something I call a function doing hts_init,
htswrap_add and then hts_main(file://filetoparse and options).
XH_uinit is done at the end of hts_main isn't it?
Is there a way I could do only once hts_main and use another function to give
it another file to parse (callback postprossess-html perhaps? to be honest I
do not clearly understand what it does ...)

I will test your advice on -* parameter.

thank you agin.