diff --git a/report_close_statement.py b/report_close_statement.py
index ce0d0d3..41c66e9 100644
--- a/report_close_statement.py
+++ b/report_close_statement.py
@@ -5,6 +5,7 @@ from trytond.wizard import Wizard, StateView, Button, StateReport
 from trytond.transaction import Transaction
 from trytond.pool import Pool
 from trytond.report import Report
+from trytond.exceptions import UserError
 from decimal import Decimal
 
 from datetime import date
@@ -155,6 +156,8 @@ class CashRegister(Report):
                                   order=[('id', 'ASC')])
 
         if not today_sales:
+            raise UserError(str("No se han encontrado ventas para este día."))
+            
             return
         untaxed_amount = 0
         tax_amount = 0