Hello! There is an ambiguous dependence between H323_H46019M and H323_H46024A in include/h460/h46018_h225.h and in src/h460/h46018_h225.cxx. In h46018_h225.cxx code of PBoolean H46019UDPSocket::GetPeerAddress(PIPSocketAddressAndPort & addr) will be compiled only if H323_H46019M and H323_H46024A are defined both (#ifdef H323_H46019M at line 1523 is called while we are in #ifdef H323_H46024A block, which starts at line 1461). In h46018_h225.h this function is only dependent on H323_H46019M. I've made a small patch which, assuming the correctness of h46018_h225.h. С уважением, Денис Кочмашев Руководитель группы Телефонии Энфорта /ООО "Престиж-Интернет"/ Центр технической эксплуатации г. Екатеринбург раб.тел. : +7 343 3789808 доб.1811 моб.тел. : +7 909 0222711 корп.тел.: (0 343) 1811 e-mail : <mailto:d.kochmashev@enforta.com> d.kochmashev@enforta.com