diff --git a/sf_manufacturing/wizard/production_technology_wizard.py b/sf_manufacturing/wizard/production_technology_wizard.py
index 0415d1fd..66d7ea8d 100644
--- a/sf_manufacturing/wizard/production_technology_wizard.py
+++ b/sf_manufacturing/wizard/production_technology_wizard.py
@@ -3,6 +3,7 @@
 import logging
 from itertools import groupby
 from odoo import models, api, fields, _
+from odoo.exceptions import UserError
 
 
 class ProductionTechnologyWizard(models.TransientModel):
@@ -88,7 +89,10 @@ class ProductionTechnologyWizard(models.TransientModel):
         for item in productions:
             workorder = item.workorder_ids.filtered(lambda wo: wo.state not in ('cancel')).sorted(
                 key=lambda a: a.sequence)
-            if workorder[0].state in ['pending']:
-                if workorder[0].production_id.product_id.categ_id.type == '成品' and item.programming_state != '已编程':
-                    workorder[0].state = 'waiting'
+            first_element = workorder[0] if workorder else None
+            if not first_element:
+                raise UserError('工艺确认后，工单未生成，请检查配置')
+            if first_element.state in ['pending']:
+                if first_element.production_id.product_id.categ_id.type == '成品' and item.programming_state != '已编程':
+                    first_element.state = 'waiting'
         return productions