diff --git a/designer-base/src/main/java/com/fr/design/javascript/ExportJavaScriptPane.java b/designer-base/src/main/java/com/fr/design/javascript/ExportJavaScriptPane.java
index f3367206f..460e838c5 100644
--- a/designer-base/src/main/java/com/fr/design/javascript/ExportJavaScriptPane.java
+++ b/designer-base/src/main/java/com/fr/design/javascript/ExportJavaScriptPane.java
@@ -2,6 +2,7 @@ package com.fr.design.javascript;
 
 import com.fr.base.BaseFormula;
 import com.fr.base.Parameter;
+import com.fr.base.extension.FileExtension;
 import com.fr.design.dialog.BasicDialog;
 import com.fr.design.dialog.BasicPane;
 import com.fr.design.dialog.DialogActionAdapter;
@@ -417,6 +418,9 @@ public class ExportJavaScriptPane extends AbstractHyperLinkPane<ExportJavaScript
             if (path == null) {
                 throw new Exception(com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Function_The_Selected_File_Cannot_Be_Null"));
             }
+            if (path.endsWith(FileExtension.CPTX.getExtension())) {
+                throw new Exception(Toolkit.i18nText("Fine-Design_Basic_Function_Cptx_Unsupported"));
+            }
         }
 
         /**