I add -lz but, now I have a new error : Jun 13 07:49:13 bridge zorp_http[12247]: (zorp@site/intra_http:0/http): Signal (11) received, stackdump follows; Jun 13 07:49:13 bridge zorp_http[12247]: (zorp@site/intra_http:0/http): Fatal signal occurred, dumping stack; eax='00000000', ebx='00000000', ecx='00000000', edx='00000000', esi='00000000', edi='00000000', eip='00000000' Jun 13 07:49:13 bridge zorp_http[12247]: (zorp@site/intra_http:0/http): retaddr=0x0, ebp=0x0 Jun 13 07:49:13 bridge zorp_http[12247]: (zorp@site/intra_http:0/http): 08048000-0804b000 r-xp 00000000 03:42 288358 /usr/local/lib/zorp/zorp Jun 13 07:49:13 bridge zorp_http[12247]: (zorp@site/intra_http:0/http): 0804b000-0804c000 rw-p 00002000 03:42 288358 /usr/local/lib/zorp/zorp How can I have a better error message ? Philippe Lucas