LINQ to Entities does not support LINQ expression node-type ' arrayindex '

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2015-03-28 14:53:24,440 [ten] ERROR log-system.notsupportedexception:linq to entities does not support LINQ expression node type ' arrayindex '.
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.NotSupportedTranslator.Translate ( Expressionconverter parent, Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TranslateExpression (Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.UnaryTranslator.TypedTranslate (expressionconverter Parent, Unaryexpression LINQ)
At System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TypedTranslator ' 1.Translate (expressionconverter Parent, Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TranslateExpression (Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.EqualsTranslator.TypedTranslate (expressionconverter Parent, Binaryexpression LINQ)
At System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TypedTranslator ' 1.Translate (expressionconverter Parent, Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TranslateExpression (Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.BinaryTranslator.TypedTranslate (expressionconverter Parent, Binaryexpression LINQ)
At System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TypedTranslator ' 1.Translate (expressionconverter Parent, Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TranslateExpression (Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TranslateLambda (LambdaExpression Lambda, dbexpression Input
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TranslateLambda (LambdaExpression Lambda, dbexpression Input, dbexpressionbinding& binding)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate ( Expressionconverter parent, Methodcallexpression call, dbexpression& source, dbexpressionbinding& Sourcebinding, dbexpression& Lambda)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate ( Expressionconverter parent, Methodcallexpression Call)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.MethodCallTranslator.SequenceMethodTranslator.Translate (expressionconverter parent, methodcallexpression call, Sequencemethod Sequencemethod)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate ( Expressionconverter parent, Methodcallexpression LINQ)
At System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TypedTranslator ' 1.Translate (expressionconverter Parent, Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.TranslateExpression (Expression LINQ)
In System.Data.Entity.Core.Objects.ELinq.ExpressionConverter.Convert ()
In System.Data.Entity.Core.Objects.ELinq.ELinqQueryState.GetExecutionPlan (Nullable ' 1 formergeoption)
In System.Data.Entity.Core.Objects.ObjectQuery ' 1.<>c__displayclass3.<getresults>b__2 ()
In System.data.entity.core.objects.objectcontext.executeintransaction[t] (func ' 1 func, Idbexecutionstrategy Executionstrategy, Boolean startlocaltransaction, Boolean releaseconnectiononsuccess)
In System.Data.Entity.Core.Objects.ObjectQuery ' 1.<>c__displayclass3.<getresults>b__1 ()
In System.data.entity.sqlserver.defaultsqlexecutionstrategy.execute[tresult] (Func ' 1 operation)
At System.Data.Entity.Core.Objects.ObjectQuery ' 1.GetResults (Nullable ' 1 formergeoption)
In System.Data.Entity.Core.Objects.ObjectQuery ' 1.<system.collections.generic.ienumerable<t>. Getenumerator>b__0 ()
In System.Data.Entity.Internal.LazyEnumerator ' 1.MoveNext ()
At System.Collections.Generic.List ' 1..ctor (IEnumerable ' 1 collection)
In System.linq.enumerable.tolist[tsource] (IEnumerable ' 1 source)
In LoTBlog.Back.Controllers.ArticleController.Update (Int32 GroupType, Int32 ArticleID) Location c:\Users\DNT\Desktop\ Lotcode\lotblog\lotblog.back\controllers\articlecontroller.cs: Line No. 272
In Lambda_method (Closure, Controllerbase, object[])
In System.Web.Mvc.ActionMethodDispatcher.Execute (Controllerbase Controller, object[] parameters)
In System.Web.Mvc.ReflectedActionDescriptor.Execute (ControllerContext controllercontext, IDictionary ' 2 parameters)
In System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod (ControllerContext ControllerContext, Actiondescriptor Actiondescriptor, IDictionary ' 2 parameters)
In System.Web.Mvc.Async.AsyncControllerActionInvoker.InvokeSynchronousActionMethod (controllercontext ControllerContext, Actiondescriptor actiondescriptor, IDictionary ' 2 parameters)
In system.web.mvc.async.asynccontrolleractioninvoker.<>c__displayclass42.< Begininvokesynchronousactionmethod>b__41 ()
In System.web.mvc.async.asyncresultwrapper.<>c__displayclass8 ' 1.<beginsynchronous>b__7 (IAsyncResult _ )
In System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult ' 1.End ()
In System.web.mvc.async.asyncresultwrapper.end[tresult] (IAsyncResult asyncResult, Object tag)
In System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod (IAsyncResult asyncResult)
In system.web.mvc.async.asynccontrolleractioninvoker.<>c__displayclass37.<>c__displayclass39.< Begininvokeactionmethodwithfilters>b__33 ()
In system.web.mvc.async.asynccontrolleractioninvoker.<>c__displayclass4f.< Invokeactionmethodfilterasynchronously>b__49 ()
In system.web.mvc.async.asynccontrolleractioninvoker.<>c__displayclass37.< begininvokeactionmethodwithfilters>b__36 (IAsyncResult AsyncResult)
In System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult ' 1.End ()
In System.web.mvc.async.asyncresultwrapper.end[tresult] (IAsyncResult asyncResult, Object tag)
In System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters (IAsyncResult asyncResult)
In system.web.mvc.async.asynccontrolleractioninvoker.<>c__displayclass25.<>c__displayclass2a.< Begininvokeaction>b__20 ()
In System.web.mvc.async.asynccontrolleractioninvoker.<>c__displayclass25.<begininvokeaction>b__22 ( IAsyncResult AsyncResult)

LINQ to Entities does not support LINQ expression node-type ' arrayindex '