Hi, I saw the same issues. Just open up mod_managed and re add the constructor back. Use the old code if you need a sample. public Api() : this(freeswitchPINVOKE.new_Api(), true) { } [DllImport("mod_managed", EntryPoint = "CSharp_new_Api")] public static extern IntPtr new_Api(); I will one day open a jar to have this fixed but I got busy. Andrew Robodialer.net From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Srini K Sent: Thursday, June 26, 2014 9:51 AM To: fs Subject: [Freeswitch-users] Params to FS Native.Api() changed. How to get handle of CoreSession? Hi, In older version of FreeSWITCH I have been using FreeSWITCH.Native.Api(). For eg, string uuid = new FreeSWITCH.Native.Api().ExecuteString("create_uuid"); activeCalls = new FreeSWITCH.Native.Api().ExecuteString("show calls") I updated FS to latest version. Now Native.Api expects CoreSession as param. FreeSWITCH.Native.Api(FreeSWITCH.Native.CoreSession) How to get handle of CoreSession. Iam using mod_managed. Thanks in advance. Srini