diff --git a/app.js b/app.js
index ceee604..e8c9c01 100644
--- a/app.js
+++ b/app.js
@@ -188,18 +188,27 @@ if (typeof CreateObject === "undefined") {
 }
 
 if (typeof UseObject === "undefined") {
-    var UseObject = function(progId, callback) {
-        var _dispose = function(obj) {
-            try {
-                obj.Close();
-            } catch (e) { /* ignore */ }
-        };
+    var UseObject = function(progId, callback, dispose, fallback) {
+        if (typeof callback !== "function") {
+            return null;
+        }
+        
+        if (typeof dispose !== "function") {
+            dispose = function(obj) {
+                try {
+                    obj.Close();
+                } catch (e) { /* ignore */ }
+            };
+        }
         
         var obj = CreateObject(progId);
         try {
             return callback(obj);
+        } catch (e) {
+            return (typeof fallback === "function" ?
+                fallback(obj, e) : null);
         } finally {
-            _dispose(obj);
+            dispose(obj);
             obj = null;
         }
     }
diff --git a/lib/pipe-ipc.js b/lib/pipe-ipc.js
index 693c24a..779635b 100644
--- a/lib/pipe-ipc.js
+++ b/lib/pipe-ipc.js
@@ -160,19 +160,22 @@ function Converter() {
     };
     
     this.repositionObject = function(stream, position) {
-        position = (position !== "number" ? 0 : position);
+        position = (typeof position !== "number" ? 0 : position);
+
+        var _dispose = function() {};  // prevent dispose after repositionObject
         
         return UseObject("ADODB.Stream", function(newStream) {
             newStream.Type = adTypeBinary;
             newStream.Mode = adModeReadWrite;
             newStream.Open();
+            
             stream.Position = position;
             stream.CopyTo(newStream);
             stream.Flush();
             stream.Close();
+            
             return newStream;
-        });
-
+        }, _dispose);
     };
 }
 
@@ -413,9 +416,12 @@ function PipeIPC() {
                     stream.Charset = charset;
                     stream.Open();
                     stream.WriteText(str);
-                    stream = (new Converter()).repositionObject(stream, 3);
-                    stream.SaveToFile(dst, adSaveCreateOverWrite);
-                    stream.Close();
+                    
+                    var newStream = (new Converter()).repositionObject(stream, 3);
+                    newStream.SaveToFile(dst, adSaveCreateOverWrite);
+                    newStream.Close();
+                    
+                    // will be auto dispose by UseObject
                 });
 
                 // Set a result
@@ -565,7 +571,7 @@ exports.adSaveCreateNotExist = adSaveCreateNotExist;
 exports.adSaveCreateOverWrite = adSaveCreateOverWrite;
 exports.adModeReadWrite = adModeReadWrite;
 
-exports.VERSIONINFO = "PIPE-based IPC Module (pipe-ipc.js) version 0.1.24";
+exports.VERSIONINFO = "PIPE-based IPC Module (pipe-ipc.js) version 0.1.26";
 exports.AUTHOR = "gnh1201@catswords.re.kr";
 exports.global = global;
 exports.require = require;