diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4b8bb23..d25d2f0f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/).
 
+Please see [here](https://github.com/hrntsm/Tunny/releases) for the data released for each version.
+
+## [0.1.1] -2022-04-17
+
+### Fixed
+
+- If there is no modelmesh input and use restore function, gh is crashed bug.
+
 ## [0.1.0] -2022-04-14
 
 ### Added
diff --git a/Tunny/Tunny.csproj b/Tunny/Tunny.csproj
index 701360c7..33c5607e 100644
--- a/Tunny/Tunny.csproj
+++ b/Tunny/Tunny.csproj
@@ -2,7 +2,7 @@
 	
   <PropertyGroup>
     <TargetFramework>net48</TargetFramework>
-    <Version>1.0</Version>
+    <Version>0.1.1</Version>
     <Title>Tunny</Title>
     <Description>Tunny is an optimization component wrapped in optuna.</Description>
     <TargetExt>.gha</TargetExt>
diff --git a/Tunny/UI/OptimizationWindow.cs b/Tunny/UI/OptimizationWindow.cs
index 704ae764..e75e526b 100644
--- a/Tunny/UI/OptimizationWindow.cs
+++ b/Tunny/UI/OptimizationWindow.cs
@@ -124,7 +124,7 @@ private void RestoreButton_Click(object sender, EventArgs e)
             var modelMesh = new GH_Structure<GH_Mesh>();
             var variables = new GH_Structure<GH_Number>();
             var objectives = new GH_Structure<GH_Number>();
-            IEnumerable<string> nickName = _component.GhInOut.Sliders.Select(x => x.NickName);
+            var nickName = _component.GhInOut.Sliders.Select(x => x.NickName).ToArray();
 
             var optuna = new Optuna(_component.GhInOut.ComponentFolder);
             string studyName = studyNameTextBox.Text;
@@ -164,6 +164,10 @@ private static void SetObjectives(GH_Structure<GH_Number> objectives, ModelResul
 
         private static void SetModelMesh(GH_Structure<GH_Mesh> modelMesh, ModelResult model)
         {
+            if (model.Draco == string.Empty)
+            {
+                return;
+            }
             var mesh = (Mesh)DracoCompression.DecompressBase64String(model.Draco);
             modelMesh.Append(new GH_Mesh(mesh), new GH_Path(0, model.Number));
         }