diff --git a/import_lots/doc/RELEASE_NOTES.md b/import_lots/doc/RELEASE_NOTES.md
index 917f6adc6..7c380bff8 100644
--- a/import_lots/doc/RELEASE_NOTES.md
+++ b/import_lots/doc/RELEASE_NOTES.md
@@ -4,3 +4,8 @@
 #### Version 16.0.1.0.0
 #### ADD
 - Initial commit for Import Lot from Excel
+
+#### 05.07.2024
+#### Version 15.0.1.0.2
+##### Fix on the validation for import
+- Bug Fix
diff --git a/import_lots/wizard/lots_attachment.py b/import_lots/wizard/lots_attachment.py
index 46b03ca4d..c50ea0d61 100644
--- a/import_lots/wizard/lots_attachment.py
+++ b/import_lots/wizard/lots_attachment.py
@@ -21,7 +21,7 @@
 ###############################################################################
 from odoo import fields, models
 from odoo import _
-from odoo.exceptions import UserError
+from odoo.exceptions import UserError, ValidationError
 import openpyxl
 import base64
 from io import BytesIO
@@ -54,6 +54,8 @@ class LotsAttachment(models.TransientModel):
         wb = openpyxl.load_workbook(
             filename=BytesIO(base64.b64decode(self.attachment)), read_only=True) \
             if self.attachment else ""
+        if not wb:
+            raise ValidationError(_('Check whether you upload the document'))
         ws = wb.active
         # Check if product exists in the sheet
         product_found = any(