diff --git a/RailsSharp.Example/App/TestCtrl.js b/RailsSharp.Example/App/TestCtrl.js
index da10200..e0cecd6 100644
--- a/RailsSharp.Example/App/TestCtrl.js
+++ b/RailsSharp.Example/App/TestCtrl.js
@@ -1,13 +1,7 @@
-var Status = (function () {
-    function Status() {
-    }
-    Status.Unknown = 'Unknown';
-    Status.Success = 'Success';
-    return Status;
-})();
 var TestState = (function () {
     function TestState() {
-        this.singleRequestAndResponse = Status.Unknown;
+        this.singleRequestAndResponse = false;
+        this.requestThatResultsInError = false;
     }
     return TestState;
 })();
@@ -19,7 +13,19 @@ function TestCtrl($scope, eventRegistry) {
     };
     eventRegistry.hook(TestEvents.TestSingleResponse, function (reply) {
         $scope.$apply(function () {
-            $scope.testState.singleRequestAndResponse = Status.Success;
+            $scope.testState.singleRequestAndResponse = true;
+        });
+    });
+    var errorTestRunning = false;
+    $scope.inititeRequestThatResultsInErrorTest = function () {
+        errorTestRunning = true;
+        eventRegistry.raise(TestEvents.TestFailedRequest, {});
+    };
+    eventRegistry.hook(ServerEvents.OnError, function (error) {
+        $scope.$apply(function () {
+            if (errorTestRunning) {
+                $scope.testState.requestThatResultsInError = true;
+            }
         });
     });
 }
diff --git a/RailsSharp.Example/App/TestCtrl.js.map b/RailsSharp.Example/App/TestCtrl.js.map
index 1680bdb..d4dad4d 100644
--- a/RailsSharp.Example/App/TestCtrl.js.map
+++ b/RailsSharp.Example/App/TestCtrl.js.map
@@ -1 +1 @@
-{"version":3,"file":"TestCtrl.js","sourceRoot":"","sources":["TestCtrl.ts"],"names":["Status","Status.constructor","TestState","TestState.constructor","TestCtrl"],"mappings":"AAKA,IAAM,MAAM;IAAZA,SAAMA,MAAMA;IAGZC,CAACA;IAFOD,cAAOA,GAAGA,SAASA,CAACA;IACpBA,cAAOA,GAAGA,SAASA,CAACA;IAC5BA,aAACA;AAADA,CAACA,AAHD,IAGC;AAED,IAAM,SAAS;IACdE,SADKA,SAASA;QAEbC,IAAIA,CAACA,wBAAwBA,GAAGA,MAAMA,CAACA,OAAOA,CAACA;IAChDA,CAACA;IAIFD,gBAACA;AAADA,CAACA,AAPD,IAOC;AAGD,AADA,4CAA4C;SACnC,QAAQ,CAAC,MAAkB,EAAE,aAAmC;IACxEE,MAAMA,CAACA,SAASA,GAAGA,IAAIA,SAASA,EAAEA,CAACA;IAEnCA,MAAMA,CAACA,mCAAmCA,GAAGA;QAC5CA,aAAaA,CAACA,KAAKA,CAACA,UAAUA,CAACA,iBAAiBA,EAAEA,EAAEA,CAACA,CAACA;IACvDA,CAACA,CAAAA;IAEDA,aAAaA,CAACA,IAAIA,CAACA,UAAUA,CAACA,kBAAkBA,EAACA,UAACA,KAAyBA;QAC1EA,MAAMA,CAACA,MAAMA,CAACA;YACbA,MAAMA,CAACA,SAASA,CAACA,wBAAwBA,GAAGA,MAAMA,CAACA,OAAOA,CAACA;QAC5DA,CAACA,CAACA,CAACA;IACJA,CAACA,CAACA,CAACA;AACJA,CAACA;AAED,QAAQ,CAAC,OAAO,GAAG,CAAC,QAAQ,EAAE,eAAe,CAAC,CAAC"}
\ No newline at end of file
+{"version":3,"file":"TestCtrl.js","sourceRoot":"","sources":["TestCtrl.ts"],"names":["TestState","TestState.constructor","TestCtrl"],"mappings":"AAMA,IAAM,SAAS;IACdA,SADKA,SAASA;QAEbC,IAAIA,CAACA,wBAAwBA,GAAGA,KAAKA,CAACA;QACtCA,IAAIA,CAACA,yBAAyBA,GAAGA,KAAKA,CAACA;IACxCA,CAACA;IAGFD,gBAACA;AAADA,CAACA,AAPD,IAOC;AAGD,AADA,4CAA4C;SACnC,QAAQ,CAAC,MAAkB,EAAE,aAAmC;IACxEE,MAAMA,CAACA,SAASA,GAAGA,IAAIA,SAASA,EAAEA,CAACA;IAEnCA,MAAMA,CAACA,mCAAmCA,GAAGA;QAC5CA,aAAaA,CAACA,KAAKA,CAACA,UAAUA,CAACA,iBAAiBA,EAAEA,EAAEA,CAACA,CAACA;IACvDA,CAACA,CAAAA;IAEDA,aAAaA,CAACA,IAAIA,CAACA,UAAUA,CAACA,kBAAkBA,EAACA,UAACA,KAAyBA;QAC1EA,MAAMA,CAACA,MAAMA,CAACA;YACbA,MAAMA,CAACA,SAASA,CAACA,wBAAwBA,GAAGA,IAAIA,CAACA;QAClDA,CAACA,CAACA,CAACA;IACJA,CAACA,CAACA,CAACA;IAEHA,IAAIA,gBAAgBA,GAAGA,KAAKA,CAACA;IAC7BA,MAAMA,CAACA,oCAAoCA,GAAGA;QAC7CA,gBAAgBA,GAAGA,IAAIA,CAACA;QACxBA,aAAaA,CAACA,KAAKA,CAACA,UAAUA,CAACA,iBAAiBA,EAAEA,EAAEA,CAACA,CAACA;IACvDA,CAACA,CAAAA;IAEDA,aAAaA,CAACA,IAAIA,CAACA,YAAYA,CAACA,OAAOA,EAACA,UAACA,KAAKA;QAC7CA,MAAMA,CAACA,MAAMA,CAACA;YACbA,EAAEA,CAACA,CAACA,gBAAgBA,CAACA,CAACA,CAACA;gBACtBA,MAAMA,CAACA,SAASA,CAACA,yBAAyBA,GAAGA,IAAIA,CAACA;YACnDA,CAACA;QACFA,CAACA,CAACA,CAACA;IACJA,CAACA,CAACA,CAACA;AAEJA,CAACA;AAED,QAAQ,CAAC,OAAO,GAAG,CAAC,QAAQ,EAAE,eAAe,CAAC,CAAC"}
\ No newline at end of file
diff --git a/RailsSharp.Example/App/TestCtrl.ts b/RailsSharp.Example/App/TestCtrl.ts
index c271286..2482918 100644
--- a/RailsSharp.Example/App/TestCtrl.ts
+++ b/RailsSharp.Example/App/TestCtrl.ts
@@ -1,20 +1,16 @@
 interface ITestScope extends ng.IScope {
 	testState: TestState;
 	inititeSingleRequestAndResponseTest(): void;
-}
-
-class Status {
-	static Unknown = 'Unknown';
-	static Success = 'Success';
+	inititeRequestThatResultsInErrorTest(): void;
 }
 
 class TestState {
 	constructor() {
-		this.singleRequestAndResponse = Status.Unknown;
+		this.singleRequestAndResponse = false;
+		this.requestThatResultsInError = false;
 	}
-
-	singleRequestAndResponse: Status;
-
+	singleRequestAndResponse: boolean;
+	requestThatResultsInError: boolean;
 }
 
 // ReSharper disable once InconsistentNaming
@@ -27,9 +23,24 @@ function TestCtrl($scope: ITestScope, eventRegistry: jMess.IEventRegistry) {
 
 	eventRegistry.hook(TestEvents.TestSingleResponse,(reply: TestSingleResponse) => {
 		$scope.$apply(() => {
-			$scope.testState.singleRequestAndResponse = Status.Success;	
+			$scope.testState.singleRequestAndResponse = true;
 		});
 	});
+
+	var errorTestRunning = false;
+	$scope.inititeRequestThatResultsInErrorTest = () => {
+		errorTestRunning = true;
+		eventRegistry.raise(TestEvents.TestFailedRequest, {});
+	}
+
+	eventRegistry.hook(ServerEvents.OnError,(error) => {
+		$scope.$apply(() => {
+			if (errorTestRunning) {
+				$scope.testState.requestThatResultsInError = true;
+			}
+		});
+	});
+
 }
 
 TestCtrl.$inject = ['$scope', 'eventRegistry'];
\ No newline at end of file
diff --git a/RailsSharp.Example/App/TypeScriptEvents.js b/RailsSharp.Example/App/TypeScriptEvents.js
index 6f82134..8610a3b 100644
--- a/RailsSharp.Example/App/TypeScriptEvents.js
+++ b/RailsSharp.Example/App/TypeScriptEvents.js
@@ -3,6 +3,14 @@ var TestEvents = (function () {
     }
     TestEvents.TestSingleRequest = 'TestTestSingleRequest';
     TestEvents.TestSingleResponse = 'TestTestSingleResponse';
+    TestEvents.TestFailedRequest = 'TestTestFailedRequest';
+    TestEvents.TestFailedResponse = 'TestTestFailedResponse';
+    TestEvents.TestSingleLegacyRequest = 'TestTestSingleLegacyRequest';
+    TestEvents.TestSingleLegacyResponse = 'TestTestSingleLegacyResponse';
+    TestEvents.TestDoubleARequest = 'TestTestDoubleARequest';
+    TestEvents.TestDoubleAResponse = 'TestTestDoubleAResponse';
+    TestEvents.TestDoubleBRequest = 'TestTestDoubleBRequest';
+    TestEvents.TestDoubleBResponse = 'TestTestDoubleBResponse';
     return TestEvents;
 })();
 var ServerEvents = {
diff --git a/RailsSharp.Example/App/TypeScriptEvents.js.map b/RailsSharp.Example/App/TypeScriptEvents.js.map
index 911599a..e7b8416 100644
--- a/RailsSharp.Example/App/TypeScriptEvents.js.map
+++ b/RailsSharp.Example/App/TypeScriptEvents.js.map
@@ -1 +1 @@
-{"version":3,"file":"TypeScriptEvents.js","sourceRoot":"","sources":["TypeScriptEvents.ts"],"names":["TestEvents","TestEvents.constructor"],"mappings":"AAOC,IAAM,UAAU;IAAhBA,SAAMA,UAAUA;IAKdC,CAACA;IAHKD,4BAAiBA,GAAYA,uBAAuBA,CAACA;IAErDA,6BAAkBA,GAAYA,wBAAwBA,CAACA;IAC7DA,iBAACA;AAADA,CAACA,AALH,IAKG;AAEJ,IAAI,YAAY,GAAG;IAClB,OAAO,EAAE,eAAe;IACxB,MAAM,EAAE,cAAc;IACtB,cAAc,EAAE,sBAAsB;CACtC,CAAC"}
\ No newline at end of file
+{"version":3,"file":"TypeScriptEvents.js","sourceRoot":"","sources":["TypeScriptEvents.ts"],"names":["TestEvents","TestEvents.constructor"],"mappings":"AASC,IAAM,UAAU;IAAhBA,SAAMA,UAAUA;IAqBdC,CAACA;IAnBKD,4BAAiBA,GAAYA,uBAAuBA,CAACA;IAErDA,6BAAkBA,GAAYA,wBAAwBA,CAACA;IAEvDA,4BAAiBA,GAAYA,uBAAuBA,CAACA;IAErDA,6BAAkBA,GAAYA,wBAAwBA,CAACA;IAEvDA,kCAAuBA,GAAYA,6BAA6BA,CAACA;IAEjEA,mCAAwBA,GAAYA,8BAA8BA,CAACA;IAEnEA,6BAAkBA,GAAYA,wBAAwBA,CAACA;IAEvDA,8BAAmBA,GAAYA,yBAAyBA,CAACA;IAEzDA,6BAAkBA,GAAYA,wBAAwBA,CAACA;IAEvDA,8BAAmBA,GAAYA,yBAAyBA,CAACA;IAC/DA,iBAACA;AAADA,CAACA,AArBH,IAqBG;AAEJ,IAAI,YAAY,GAAG;IAClB,OAAO,EAAE,eAAe;IACxB,MAAM,EAAE,cAAc;IACtB,cAAc,EAAE,sBAAsB;CACtC,CAAC"}
\ No newline at end of file
diff --git a/RailsSharp.Example/App/TypeScriptEvents.ts b/RailsSharp.Example/App/TypeScriptEvents.ts
index 6cee5ce..4a82512 100644
--- a/RailsSharp.Example/App/TypeScriptEvents.ts
+++ b/RailsSharp.Example/App/TypeScriptEvents.ts
@@ -1,5 +1,7 @@
 
 
+	declare class TestFailedRequest {
+			}
 	declare class TestSingleRequest {
 			}
 	declare class TestSingleResponse {
@@ -10,6 +12,22 @@
 		static TestSingleRequest : string = 'TestTestSingleRequest';
 					
 		static TestSingleResponse : string = 'TestTestSingleResponse';
+					
+		static TestFailedRequest : string = 'TestTestFailedRequest';
+					
+		static TestFailedResponse : string = 'TestTestFailedResponse';
+					
+		static TestSingleLegacyRequest : string = 'TestTestSingleLegacyRequest';
+					
+		static TestSingleLegacyResponse : string = 'TestTestSingleLegacyResponse';
+					
+		static TestDoubleARequest : string = 'TestTestDoubleARequest';
+					
+		static TestDoubleAResponse : string = 'TestTestDoubleAResponse';
+					
+		static TestDoubleBRequest : string = 'TestTestDoubleBRequest';
+					
+		static TestDoubleBResponse : string = 'TestTestDoubleBResponse';
 			}
 
 var ServerEvents = {
diff --git a/RailsSharp.Example/App_Start/HandlerConfig.cs b/RailsSharp.Example/App_Start/HandlerConfig.cs
index 9f4f3ac..71b2e88 100644
--- a/RailsSharp.Example/App_Start/HandlerConfig.cs
+++ b/RailsSharp.Example/App_Start/HandlerConfig.cs
@@ -8,6 +8,7 @@ public class HandlerConfig
 		public static void RegisterHandlers(IHandlerRepository repository)
 		{
 			repository.AddHandler<TestSingleHandler>(TestEvents.TestSingleRequest);
+			repository.AddHandler<TestFailedHandler>(TestEvents.TestFailedRequest);
 		}
 	}
 }
\ No newline at end of file
diff --git a/RailsSharp.Example/RailsSharp.Example.csproj b/RailsSharp.Example/RailsSharp.Example.csproj
index cd8b8e9..e227472 100644
--- a/RailsSharp.Example/RailsSharp.Example.csproj
+++ b/RailsSharp.Example/RailsSharp.Example.csproj
@@ -213,6 +213,8 @@
     <Compile Include="Startup.cs" />
     <Compile Include="Test\AnyoneIsAllowedHandlerBase.cs" />
     <Compile Include="Test\TestEvents.cs" />
+    <Compile Include="Test\TestFailedHandler.cs" />
+    <Compile Include="Test\TestFailedRequest.cs" />
     <Compile Include="Test\TestSingleHandler.cs" />
     <Compile Include="Test\TestSingleRequest.cs" />
     <Compile Include="Test\TestSingleResponse.cs" />
diff --git a/RailsSharp.Example/Test/AnyoneIsAllowedHandlerBase.cs b/RailsSharp.Example/Test/AnyoneIsAllowedHandlerBase.cs
index fde2122..bd2f6ea 100644
--- a/RailsSharp.Example/Test/AnyoneIsAllowedHandlerBase.cs
+++ b/RailsSharp.Example/Test/AnyoneIsAllowedHandlerBase.cs
@@ -3,9 +3,9 @@
 
 namespace RailsSharp.Example.Test
 {
-	public abstract class AnyoneIsAllowedHandlerBase : HandlerBase<TestSingleRequest, IPrincipal>
+	public abstract class AnyoneIsAllowedHandlerBase<TRequest> : HandlerBase<TRequest, IPrincipal> where TRequest : RequestBase
 	{
-		protected override bool IsAuthorized(TestSingleRequest request, IPrincipal principal)
+		protected override bool IsAuthorized(TRequest request, IPrincipal principal)
 		{
 			return true;
 		}
diff --git a/RailsSharp.Example/Test/TestEvents.cs b/RailsSharp.Example/Test/TestEvents.cs
index a801b97..18c76a8 100644
--- a/RailsSharp.Example/Test/TestEvents.cs
+++ b/RailsSharp.Example/Test/TestEvents.cs
@@ -4,5 +4,13 @@ public enum TestEvents
 	{
 		TestSingleRequest,
 		TestSingleResponse,
+		TestFailedRequest,
+		TestFailedResponse,
+		TestSingleLegacyRequest,
+		TestSingleLegacyResponse,
+		TestDoubleARequest,
+		TestDoubleAResponse,
+		TestDoubleBRequest,
+		TestDoubleBResponse,
 	}
 }
\ No newline at end of file
diff --git a/RailsSharp.Example/Test/TestFailedHandler.cs b/RailsSharp.Example/Test/TestFailedHandler.cs
new file mode 100644
index 0000000..581b4db
--- /dev/null
+++ b/RailsSharp.Example/Test/TestFailedHandler.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Security.Principal;
+
+namespace RailsSharp.Example.Test
+{
+	public class TestFailedHandler : AnyoneIsAllowedHandlerBase<TestFailedRequest>
+	{
+		protected override void Invoke(TestFailedRequest request, IPrincipal principal)
+		{
+			throw new Exception();
+		}
+	}
+}
\ No newline at end of file
diff --git a/RailsSharp.Example/Test/TestFailedRequest.cs b/RailsSharp.Example/Test/TestFailedRequest.cs
new file mode 100644
index 0000000..222ce5a
--- /dev/null
+++ b/RailsSharp.Example/Test/TestFailedRequest.cs
@@ -0,0 +1,8 @@
+using LAN.Core.Eventing;
+
+namespace RailsSharp.Example.Test
+{
+	public class TestFailedRequest : RequestBase
+	{
+	}
+}
\ No newline at end of file
diff --git a/RailsSharp.Example/Test/TestSingleHandler.cs b/RailsSharp.Example/Test/TestSingleHandler.cs
index 139afec..60418ec 100644
--- a/RailsSharp.Example/Test/TestSingleHandler.cs
+++ b/RailsSharp.Example/Test/TestSingleHandler.cs
@@ -3,7 +3,7 @@
 
 namespace RailsSharp.Example.Test
 {
-	public class TestSingleHandler : AnyoneIsAllowedHandlerBase
+	public class TestSingleHandler : AnyoneIsAllowedHandlerBase<TestSingleRequest>
 	{
 		private readonly IMessagingContext _messagingContext;
 
diff --git a/RailsSharp.Example/Views/Home/Test.cshtml b/RailsSharp.Example/Views/Home/Test.cshtml
index f527222..87c4431 100644
--- a/RailsSharp.Example/Views/Home/Test.cshtml
+++ b/RailsSharp.Example/Views/Home/Test.cshtml
@@ -7,10 +7,20 @@
 	<h3>Request/Response</h3>
 	<button class="btn btn-primary" ng-click="inititeSingleRequestAndResponseTest()">Send Request Expecting Single Reply to client.</button>
 	Result: <span class="glyphicon" ng-class="{
-				  'glyphicon-cog': testState.singleRequestAndResponse === 'Unknown',
-				  'text-warning': testState.singleRequestAndResponse === 'Unknown',
-				  'glyphicon-check': testState.singleRequestAndResponse === 'Success',
-				  'text-success': testState.singleRequestAndResponse === 'Success'}"></span>
+				  'glyphicon-cog': !testState.singleRequestAndResponse,
+				  'text-warning': !testState.singleRequestAndResponse,
+				  'glyphicon-check': testState.singleRequestAndResponse,
+				  'text-success': testState.singleRequestAndResponse}"></span>
+
+	<br />
+	<br />
+
+	<button class="btn btn-primary" ng-click="inititeRequestThatResultsInErrorTest()">Send Request Expecting unhandled exception to get returned to client.</button>
+	Result: <span class="glyphicon" ng-class="{
+				  'glyphicon-cog': !testState.requestThatResultsInError,
+				  'text-warning': !testState.requestThatResultsInError,
+				  'glyphicon-check': testState.requestThatResultsInError,
+				  'text-success': testState.requestThatResultsInError}"></span>
 
 	@* todo: test: group membership to stalwart group *@