Hi Olivier, Not able to find libunistring-dev rpm for Linux 2.6.18-274.el5. almost 4 hours I am searching for the rpm. Thanks, Prem From: sr-users-bounces(a)lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of DURECU, OLIVIER (OLIVIER) Sent: Wednesday, April 02, 2014 12:39 PM To: Kamailio (SER) - Users Mailing List Subject: Re: [SR-Users] Regarding Websocket module Hi, You may be missing a library. On Ubunutu/debian, this is the libunistring-dev package which provides the required library This is documented on the module description (modules/websocket/README) Olivier De : sr-users-bounces(a)lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] De la part de Premchandiran Envoyé : mercredi 2 avril 2014 09:00 À : sr-users(a)lists.sip-router.org Objet : [SR-Users] Regarding Websocket module Hi All, I am using kamailio-4.1.2 and os is Linux 2.6.18-274.el5. I am getting below error though websocket.so is present in /usr/local/lib64/modules/ load_module(): ERROR: load_module: could not open module </usr/local/lib64/kamailio/modules/websocket.so>: libunistring.so.0: cannot open shared object file: No such file or directory may I know what might be the cause of this error. Regards Prem