System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> Devart.Data.Oracle.OracleException: ORA-12541: TNS:no listener Host = 172.31.10.45 Port = 1521 at Devart.Data.Oracle.bj.a(String A_0, String A_1, String A_2, String A_3, String A_4, Boolean A_5) at Devart.Data.Oracle.ch.a(ds A_0, Boolean A_1) at Devart.Data.Oracle.ch.a(ds A_0, bn A_1) at Devart.Data.Oracle.OracleInternalConnection..ctor(ds connectionOptions, OracleInternalConnection proxyConnection) at Devart.Data.Oracle.dz.a(o A_0, Object A_1, DbConnectionBase A_2) at Devart.Common.DbConnectionFactory.a(DbConnectionPool A_0, o A_1, DbConnectionBase A_2) at Devart.Common.DbConnectionPool.a(DbConnectionBase A_0) at Devart.Common.DbConnectionPool.GetObject(DbConnectionBase owningConnection) at Devart.Common.DbConnectionFactory.b(DbConnectionBase A_0) at Devart.Common.DbConnectionClosed.Open(DbConnectionBase outerConnection) at Devart.Common.DbConnectionBase.Open() at Devart.Data.Oracle.OracleConnection.Open() at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.<>c.<Open>b__13_0(DbConnection t, DbConnectionInterceptionContext c) at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext](TTarget target, Action`2 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed) at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) at System.Data.Entity.Core.EntityClient.EntityConnection.<Open>b__55_0() at System.Data.Entity.Infrastructure.DefaultExecutionStrategy.Execute(Action operation) at System.Data.Entity.Core.EntityClient.EntityConnection.Open() --- End of inner exception stack trace --- at System.Data.Entity.Core.EntityClient.EntityConnection.Open() at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean shouldMonitorTransactions) at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) at System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass41_0.<GetResults>b__0() at System.Data.Entity.Infrastructure.DefaultExecutionStrategy.Execute[TResult](Func`1 operation) at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) at System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__31_0() at System.Data.Entity.Internal.LazyEnumerator`1.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source) at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<>c__14`1.<GetElementFunction>b__14_1(IEnumerable`1 sequence) at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot) at System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[TResult](Expression expression) at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source) at Retys.Dal.Catalogos.TemaDal.GetRecord(Int64 id) at Retys.Bl.Catalogos.TemaBl.GetRecord(Int64 id) at Retys.Portal.Controllers.PortalController.TyS(Int64 id, Nullable`1 organismoId, Nullable`1 temaId, Nullable`1 perfilId, Nullable`1 enLinea)