diff --git a/librf/src/awaitable.h b/librf/src/awaitable.h
index 0ed4b9e..4a65e37 100644
--- a/librf/src/awaitable.h
+++ b/librf/src/awaitable.h
@@ -33,7 +33,7 @@ namespace resumef
 		{
 			return future_type{ _state };
 		}
-	protected:
+
 		mutable counted_ptr<state_type> _state = make_counted<state_type>(true);
 	};
 
diff --git a/librf/src/state.h b/librf/src/state.h
index 8c115f7..f744f2d 100644
--- a/librf/src/state.h
+++ b/librf/src/state.h
@@ -82,6 +82,12 @@ namespace resumef
 
 		void set_exception(std::exception_ptr e);
 
+		template<class _Exp>
+		void throw_exception(_Exp e) const
+		{
+			set_exception(std::make_exception_ptr(std::move(e)));
+		}
+
 		template<class _PromiseT, typename = std::enable_if_t<is_promise_v<_PromiseT>>>
 		void future_await_suspend(coroutine_handle<_PromiseT> handler);
 
diff --git a/tutorial/test_async_multi_thread.cpp b/tutorial/test_async_multi_thread.cpp
index bf06a61..c356fc8 100644
--- a/tutorial/test_async_multi_thread.cpp
+++ b/tutorial/test_async_multi_thread.cpp
@@ -15,7 +15,7 @@ auto async_heavy_computing_tasks(int64_t val)
 {
 	using namespace std::chrono;
 
-	promise_t<int64_t> awaitable;
+	awaitable_t<int64_t> awaitable;
 
 	std::thread([val, st = awaitable._state]
 	{
diff --git a/vs_proj/librf.cpp b/vs_proj/librf.cpp
index 81bfd1e..0830c19 100644
--- a/vs_proj/librf.cpp
+++ b/vs_proj/librf.cpp
@@ -38,7 +38,9 @@ int main(int argc, const char* argv[])
 	//resumable_main_resumable();
 	//resumable_main_routine();
 	//resumable_main_exception();
-	resumable_main_dynamic_go();
+	//resumable_main_dynamic_go();
+	//resumable_main_multi_thread();
+	resumable_main_timer();
 
 /*
 	resumable_main_benchmark_mem();
@@ -48,8 +50,6 @@ int main(int argc, const char* argv[])
 		resumable_main_benchmark_asio_server();
 
 	resumable_main_when_all();
-	resumable_main_multi_thread();
-	resumable_main_timer();
 	resumable_main_sleep();
 	resumable_main_mutex();
 	resumable_main_event();
diff --git a/vs_proj/librf.vcxproj b/vs_proj/librf.vcxproj
index 95abf01..f7380de 100644
--- a/vs_proj/librf.vcxproj
+++ b/vs_proj/librf.vcxproj
@@ -249,12 +249,7 @@
     </ClCompile>
     <ClCompile Include="..\tutorial\test_async_exception.cpp" />
     <ClCompile Include="..\tutorial\test_async_modern_cb.cpp" />
-    <ClCompile Include="..\tutorial\test_async_multi_thread.cpp">
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
-    </ClCompile>
+    <ClCompile Include="..\tutorial\test_async_multi_thread.cpp" />
     <ClCompile Include="..\tutorial\test_async_mutex.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
@@ -270,12 +265,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\tutorial\test_async_suspend_always.cpp" />
-    <ClCompile Include="..\tutorial\test_async_timer.cpp">
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
-    </ClCompile>
+    <ClCompile Include="..\tutorial\test_async_timer.cpp" />
     <ClCompile Include="..\tutorial\test_async_when_all.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>