[Click] Problem with IPV6 click elements

[Capisani Luca]

Hello,
        I'm an italian student of computer science of mantua (Italy).
I'm preparing a small thesis regarding the nat-pt translator. I choosed
to implement the translator with your gt64 implementation and, with the
help of J.Battiptste I installed the click with the nat-pt translator.

After writing click configuration files, I can translate three or for
packets
before seeing the following message:
Segmentation fault

and sometimes
Segmentation fault (core dumped)

I noted that if I use the IPPrint (or IP6Print) element, the translator
doesn't translate any packet before printing Segmentation fault.

also I noted that if I use the Print element, the translator work for more
times before stopping.

I saw that the problem is known, but I doesn't saw the solution.
What can I do?
Thanks