diff --git a/designer-base/src/main/java/com/fr/file/FileFILE.java b/designer-base/src/main/java/com/fr/file/FileFILE.java
index d5a9beb42..5331cd778 100644
--- a/designer-base/src/main/java/com/fr/file/FileFILE.java
+++ b/designer-base/src/main/java/com/fr/file/FileFILE.java
@@ -201,7 +201,7 @@ public class FileFILE implements FILE {
         OutputStream out;
         try {
             StableUtils.makesureFileExist(file);
-            out = new FileOutputStream(file);
+            out = new FileOutputStream(file, true);
         } catch (Exception e) {
             throw SessionLocalManager.createLogPackedException(e);
         }