Error while initializing application: Oracle.ManagedDataAccess.Client.OracleException (0x80004005): ORA-50201: Oracle Communication: Failed to connect to server or failed to parse connect string ---> OracleInternal.Network.NetworkException (0x80004005): ORA-50201: Oracle Communication: Failed to connect to server or failed to parse connect string ---> OracleInternal.Network.NetworkException (0x80004005): ORA-12541: Cannot connect. No listener at host 10.66.253.121 port 1521. (CONNECTION_ID=yhkkouEFUEWubUOvPK7aqQ==)
https://docs.oracle.com/error-help/db/ora-12541/
at OracleInternal.Network.TcpTransportAdapter.ConnectIterate()
at OracleInternal.Network.OracleCommunication.ConnectViaCO(ConnectionOption connOption, AddressResolution addrRes, Boolean bAsync)
at OracleInternal.Network.OracleCommunication.DoConnect(String tnsDescriptor, Boolean bAsync)
at OracleInternal.Network.OracleCommunication.Connect(String tnsDescriptor, Boolean doNAHandshake, String IName, ConnectionOption CO, Boolean bAsync)
at OracleInternal.ServiceObjects.OracleConnectionImpl.Connect(ConnectionString cs, Boolean bOpenEndUserSession, OracleConnection connRefForCriteria, String instanceName, Boolean bAsync)
at OracleInternal.ConnectionPool.PoolManager`3.Get(ConnectionString csWithDiffOrNewPassw, Boolean bGetForApp, OracleConnection connRefForCriteria, String affinityInstanceName, Boolean bForceMatch, Boolean bAsync)
at OracleInternal.ConnectionPool.OraclePoolManager.Get(ConnectionString csWithNewPassw, Boolean bGetForApp, OracleConnection connRefForCriteria, String affinityInstanceName, Boolean bForceMatch, Boolean bAsync)
at OracleInternal.ConnectionPool.OracleConnectionDispenser`3.Get(ConnectionString cs, PM conPM, ConnectionString pmCS, OracleOpaqueString opaquePassw, OracleOpaqueString securedProxyPassw, OracleConnection connRefForCriteria, Boolean bAsync)
at OracleInternal.ServiceObjects.OracleConnectionInternal.OpenInternal(Boolean bAsync)
at OracleInternal.ServiceObjects.OracleConnectionInternal.Open()
at Oracle.ManagedDataAccess.Client.OracleConnection.Open()
at TICA.NET.Global.Application_Start(Object sender, EventArgs e)
