Object reference not set on procedure call

Discussion of open issues, suggestions and bugs regarding ADO.NET provider for Oracle
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Posts: 26
Joined: Tue 04 Jun 2013 13:01

Object reference not set on procedure call

Post by McMlok » Wed 08 Oct 2014 15:54


I use DB first and I import insert procedure for my entity with 2 parameters where second is output cursor with generated Id. But when somebody change procedure and add input parameter to middle I get error when I try to call procedure. There is no problem with exception on call but with message. Error looks like this

Type : System.NullReferenceException, mscorlib, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089
Message : Object reference not set to an instance of an object.
Source : Devart.Data.Oracle.Entity
Help link :
Data : System.Collections.ListDictionaryInternal
TargetSite : Void a(System.Collections.Generic.IEnumerable`1[System.Data.Common.DbParameter], Devart.Common.Entity.el)
HResult : -2147467261
Stack Trace : at Devart.Data.Oracle.Entity.z.a(IEnumerable`1 A_0, el A_1)
at Devart.Data.Oracle.Entity.aj.b(CommandBehavior A_0)
at System.Data.Mapping.Update.Internal.FunctionUpdateCommand.Execute(UpdateTranslator translator, EntityConnection connection, Dictionary`2 identifierValues, List`1 generatedValues)
at System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager stateManager, IEntityAdapter adapter)
at System.Data.Objects.ObjectContext.SaveChanges(SaveOptions options)

Can you return better excpetion with message that I have wrong number of parameters?


Devart Team
Posts: 8083
Joined: Thu 14 Aug 2008 12:44

Re: Object reference not set on procedure call

Post by Shalex » Fri 10 Oct 2014 15:49

This is the error I received with the latest (8.4.264) build of dotConnect for Oracle using your scenario:

Code: Select all

  InnerException: Devart.Data.Oracle.OracleException
       Message=ORA-06550: line 2, column 4:
PLS-00306: wrong number or types of arguments in call to 'DEPT_insert'
ORA-06550: line 2, column 4:
PL/SQL: Statement ignored
            at Devart.Data.Oracle.a2.c(Int32 A_0)
            at Devart.Data.Oracle.cm.d(Int32 A_0)
            at Devart.Data.Oracle.cm.a(Int32 A_0, b7 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(CommandBehavior behavior)
            at Devart.Data.Oracle.Entity.ai.a(CommandBehavior A_0)
            at Devart.Common.Entity.ah.b(CommandBehavior A_0)
            at Devart.Data.Oracle.Entity.ai.b(CommandBehavior A_0)
            at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
            at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
Please upgrade to the 8.4.264 version. If this doesn't help, send us a small test project with the corresponding DDL script of stored procedure for reproducing the System.NullReferenceException.

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