/mcpError Message %UC_CTI-3-kCtiTcpInitError: %[ErrorCode=Int][AppID=String][ClusterID=String] [NodeID=String]: CTIManager service is unable to initialize TCP connection. Explanation CTIManager service is unable to initialize TCP connection Recommended Action CTIManager has encountered difficulty initializing TCP connections. Restart the CTIManager service to resolve this problem. Error Message %UC_CTI-3-kCtiIllegalFilterSize: %[AppID=String][ClusterID=String] [NodeID=String]: ProviderOpenRequest; illegal filter size.. Explanation ProviderOpenRequest has an illegal filter size. Recommended Action The application is using an incompatible version of JTAPI/TSP and Cisco Unified Communications Manager. Install the JTAPI or TSP plugin (Cisco Unified CM Administration > Application > Plugins) and restart the application. Error Message %UC_CTI-4-kCtiNewCallNotifyArrayOverflow: %[AppID=String][ClusterID=String] [NodeID=String]: Possible internal array overflow condition while generating CTI NewCall event.. Explanation An unexpected internal error occurred. Recommended Action Restart the CTIManager service if the problem persists. Error Message %UC_CTI-4-kCtiExistingCallNotifyArrayOverflow: %[AppID=String][ClusterID=String] [NodeID=String]: Possible internal array overflow condition while generating CTI ExistingCall event.. Explanation An unexpected internal error occurred. Recommended Action Restart the CTIManager service if the problem persists. Error Message %UC_CTI-4-kCtiLineCallInfoResArrayOverflow: %[AppID=String][ClusterID=String] [NodeID=String]: Possible internal array overflow condition while generating response to application request for call information.. Explanation An unexpected internal error occurred. Recommended Action Restart the CTIManager service if the problem persists. Error Message %UC_CTI-4-kCtiUnknownConnectionHandle: %[CTIConnectionType=String][InstanceNumber=Long] [AppID=String][ClusterID=String][NodeID=String]: Connection handle is not valid.. Explanation A message has been received from an unknown connection, and then dropped. Recommended Action This alarm occurs when a QBE packet is received from a connection that is already disconnected. This packet will be ignored by CTIManager and no action is required. 5/24/26, 3:34 AM System Error Messages for Cisco Unified Communications Manager 15 - Cisco https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/err_msgs/15_x/ccmalarms15.html 26/343