diff --git a/Parallel/Extensions.vb b/Parallel/Extensions.vb
index 0a03a41..0396d4b 100644
--- a/Parallel/Extensions.vb
+++ b/Parallel/Extensions.vb
@@ -1,45 +1,51 @@
 #Region "Microsoft.VisualBasic::6899da998f0554355d5fe6b72ae3dc0c, Parallel\Extensions.vb"
 
-    ' Author:
-    ' 
-    '       asuka (amethyst.asuka@gcmodeller.org)
-    '       xie (genetics@smrucc.org)
-    '       xieguigang (xie.guigang@live.com)
-    ' 
-    ' Copyright (c) 2018 GPL3 Licensed
-    ' 
-    ' 
-    ' GNU GENERAL PUBLIC LICENSE (GPL3)
-    ' 
-    ' 
-    ' This program is free software: you can redistribute it and/or modify
-    ' it under the terms of the GNU General Public License as published by
-    ' the Free Software Foundation, either version 3 of the License, or
-    ' (at your option) any later version.
-    ' 
-    ' This program is distributed in the hope that it will be useful,
-    ' but WITHOUT ANY WARRANTY; without even the implied warranty of
-    ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    ' GNU General Public License for more details.
-    ' 
-    ' You should have received a copy of the GNU General Public License
-    ' along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
-
-    ' /********************************************************************************/
-
-    ' Summaries:
-
-    ' Module Extensions
-    ' 
-    ' 
-    ' 
-    ' /********************************************************************************/
+' Author:
+' 
+'       asuka (amethyst.asuka@gcmodeller.org)
+'       xie (genetics@smrucc.org)
+'       xieguigang (xie.guigang@live.com)
+' 
+' Copyright (c) 2018 GPL3 Licensed
+' 
+' 
+' GNU GENERAL PUBLIC LICENSE (GPL3)
+' 
+' 
+' This program is free software: you can redistribute it and/or modify
+' it under the terms of the GNU General Public License as published by
+' the Free Software Foundation, either version 3 of the License, or
+' (at your option) any later version.
+' 
+' This program is distributed in the hope that it will be useful,
+' but WITHOUT ANY WARRANTY; without even the implied warranty of
+' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+' GNU General Public License for more details.
+' 
+' You should have received a copy of the GNU General Public License
+' along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+
+' /********************************************************************************/
+
+' Summaries:
+
+' Module Extensions
+' 
+' 
+' 
+' /********************************************************************************/
 
 #End Region
 
+Imports Microsoft.VisualBasic.Data.IO.MessagePack
+
 <HideModuleName>
 Public Module Extensions
 
+    Public Sub RegisterDiagnoseBuffer()
+        Call MsgPackSerializer.DefaultContext.RegisterSerializer(New Serialization.StackFrameBuffer)
+        Call MsgPackSerializer.DefaultContext.RegisterSerializer(New Serialization.StackMethodBuffer)
+    End Sub
 End Module
diff --git a/Parallel/IpcParallel/Stream/EmitHandler.vb b/Parallel/IpcParallel/Stream/EmitHandler.vb
index 06c80a5..1645713 100644
--- a/Parallel/IpcParallel/Stream/EmitHandler.vb
+++ b/Parallel/IpcParallel/Stream/EmitHandler.vb
@@ -52,7 +52,6 @@
 Imports System.IO
 Imports System.Runtime.CompilerServices
 Imports System.Text
-Imports Microsoft.VisualBasic.Data.IO.MessagePack
 Imports Microsoft.VisualBasic.ValueTypes
 
 Namespace IpcStream
@@ -63,8 +62,7 @@ Namespace IpcStream
         Public Delegate Function loadBuffer(buf As Stream) As Object
 
         Sub New()
-            Call MsgPackSerializer.DefaultContext.RegisterSerializer(New Serialization.StackFrameBuffer)
-            Call MsgPackSerializer.DefaultContext.RegisterSerializer(New Serialization.StackMethodBuffer)
+            Call RegisterDiagnoseBuffer()
         End Sub
 
         Public Iterator Function PopulatePrimitiveHandles() As IEnumerable(Of (target As Type, emit As toBuffer))