diff --git a/src/IME WL Converter Win/Forms/MainForm.cs b/src/IME WL Converter Win/Forms/MainForm.cs
index 3e0dd651..f047d649 100644
--- a/src/IME WL Converter Win/Forms/MainForm.cs	
+++ b/src/IME WL Converter Win/Forms/MainForm.cs	
@@ -519,7 +519,16 @@ private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
             {
                 if (!streamExport)
                 {
-                    fileContent = mainBody.Convert(files);
+                    try
+                    {
+                        fileContent = mainBody.Convert(files);
+                    }
+                    catch(Exception ex)
+                    {
+                        mainBody.Dispose();
+                        this.richTextBox1.AppendText(ex.Message);
+                        throw ex;
+                    }
                 }
             }
             else
diff --git a/src/ImeWlConverterCore/MainBody.cs b/src/ImeWlConverterCore/MainBody.cs
index 476ee79e..a5140237 100644
--- a/src/ImeWlConverterCore/MainBody.cs
+++ b/src/ImeWlConverterCore/MainBody.cs
@@ -14,7 +14,7 @@
 namespace Studyzy.IMEWLConverter
 {
     public delegate void ProcessNotice(string message);
-    public class MainBody
+    public class MainBody:IDisposable
     {
         public event ProcessNotice ProcessNotice;
         private WordLibraryList allWlList = new WordLibraryList();
@@ -429,5 +429,10 @@ private WordLibraryList ConvertChinese(WordLibraryList wordLibraryList)
             }
             return wordLibraryList;
         }
+
+        public void Dispose()
+        {
+            this.timer.Stop();
+        }
     }
 }