Hi,

I am integrating NHibernate with Oracle using the NHibernate.Driver.OracleClientDriver class. Everything works well with the Oracle instant client version 10.1.0.5. However any version later than that results in the following error being generated. I am using NHibernate version 1.2.0.4000 (that is the version of the NHiberante.dll assembly).

2009-06-02 12:45:21,543 [1] ERROR Demo.ClientMainProgram [(null)] - Spring.Trans
action.CannotCreateTransactionException: Could not open Hibernate Session for tr
ansaction ---> NHibernate.ADOException: cannot open connection ---> System.Data.
OracleClient.OracleException: ORA-12545: Connect failed because target host or o
bject does not exist

at System.Data.OracleClient.OracleException.Check(OciErrorHandle errorHandle,
Int32 rc)
at System.Data.OracleClient.OracleInternalConnection.OpenOnLocalTransaction(S
tring userName, String password, String serverName, Boolean integratedSecurity,
Boolean unicode, Boolean omitOracleConnectionName)
at System.Data.OracleClient.OracleInternalConnection..ctor(OracleConnectionSt
ring connectionOptions)
at System.Data.OracleClient.OracleConnectionFactory.CreateConnection(DbConnec
tionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConn
ection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConn
ection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owning
Object)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection o
wningObject)
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection ownin
gObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection ow
ningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection ou
terConnection, DbConnectionFactory connectionFactory)
at System.Data.OracleClient.OracleConnection.Open()
at NHibernate.Connection.DriverConnectionProvider.GetConnection()
at NHibernate.Impl.SessionFactoryImpl.OpenConnection()

Does anybody know how to solve this? - Thanks! Philippe