Devart WCF Data Service "NET: Unknown error 1"

Problem :- Some time WCF Data Services running via Devart Data Driver Throws Exception  "NET: Unknown error 1"

<message>NET: Unknown error 1</message>

      <type>System.Exception</type>

      <stacktrace>at Devart.Data.Oracle.DirectUtils.b(Int32 A_0) at 

Solution : In My case root cause of this problem was out of memory problem , Increasing system memory and page file works for me.

Detailed Error Trace

<?xml version="1.0" encoding="utf-8" standalone="yes" ?>

- <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">

  <code />

  <message xml:lang="en-US">An error occurred while processing this request.</message>

  - <innererror>

    <message>Exception has been thrown by the target of an invocation.</message>

    <type>System.Reflection.TargetInvocationException</type>

    <stacktrace>at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

    at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

    at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

    at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

    at System.Data.Services.Providers.BaseServiceProvider.InvokeServiceOperation(ServiceOperation serviceOperation, Object[] parameters)

    at System.Data.Services.RequestUriProcessor.CreateFirstSegment(IDataService service, String identifier, Boolean checkRights, String queryPortion, Boolean isLastSegment, Boolean& crossReferencingUrl)

    at System.Data.Services.RequestUriProcessor.CreateSegments(String[] segments, IDataService service) at System.Data.Services.RequestUriProcessor.ProcessRequestUri(Uri absoluteRequestUri, IDataService service)

    at System.Data.Services.DataService`1.ProcessIncomingRequestUri() at System.Data.Services.DataService`1.HandleRequest()</stacktrace>

    - <internalexception>

      <message>NET: Unknown error 1</message>

      <type>System.Exception</type>

      <stacktrace>at Devart.Data.Oracle.DirectUtils.b(Int32 A_0) at Devart.Data.Oracle.DirectUtils.a()

      at Devart.Data.Oracle.cd.a(Byte A_0) at Devart.Data.Oracle.cb.a(Byte A_0)

      at Devart.Data.Oracle.cp.a() at Devart.Data.Oracle.ao.a()

      at Devart.Data.Oracle.g.a()

      at Devart.Data.Oracle.u.a(Int32 A_0, bh A_1)

      at Devart.Data.Oracle.OracleCommand.InternalExecute(CommandBehavior behavior, IDisposable disposable, Int32 startRecord, Int32 maxRecords, Boolean nonQuery)

      at Devart.Common.DbCommandBase.ExecuteDbDataReader(CommandBehavior behavior, Boolean nonQuery)

      at Devart.Common.DbCommandBase.ExecuteDbDataReader(CommandBehavior behavior)

      at System.Data.Common.DbCommand.ExecuteReader()

      at System.Data.Objects.ObjectContext.ExecuteStoreQueryInternal[TElement](String commandText, String entitySetName, MergeOption mergeOption, Object[] parameters)

      at System.Data.Objects.ObjectContext.ExecuteStoreQuery[TElement](String commandText, Object[] parameters)

      at BUSS.ODS.HCOHCPAlternateIDDataService.HCOHCPAlternateIDs(String language, String country, String partytype) in Y:\src\BUSS\Service.cs:line 60</stacktrace>

    </internalexception>

  </innererror>

</error>