diff --git a/source/app/models/main.py b/source/app/models/main.py
index 6d60aa8..312a24c 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -2057,7 +2057,11 @@ class Facturas(BaseModel):
 
     @classmethod
     def get_pdf(cls, id, rfc):
-        emisor = Emisor.select()[0]
+        try:
+            emisor = Emisor.select()[0]
+        except IndexError:
+            return b'', 'sin_datos_de_emisor.pdf'
+
         obj = Facturas.get(Facturas.id==id)
         name = '{}{}_{}.pdf'.format(obj.serie, obj.folio, obj.cliente.rfc)
         if obj.uuid is None:
diff --git a/source/static/js/controller/invoices.js b/source/static/js/controller/invoices.js
index df82d72..2e03ff9 100644
--- a/source/static/js/controller/invoices.js
+++ b/source/static/js/controller/invoices.js
@@ -82,6 +82,22 @@ function get_regimen_fiscal(){
 }
 
 
+function validar_timbrar(){
+    webix.ajax().sync().get('/values/validartimbrar', function(text, data){
+        var values = data.json()
+        if(!values.ok){
+            msg_error(values.msg)
+            $$('cmd_timbrar').disable()
+        }else{
+            if(values.msg){
+                msg_error(values.msg)
+            }
+            $$('cmd_timbrar').enable()
+        }
+    })
+}
+
+
 function default_config(){
     webix.ajax().sync().get('/values/taxes', function(text, data){
         var values = data.json()
@@ -96,18 +112,7 @@ function default_config(){
     table_pt.clear()
     table_totals.clear()
 
-    webix.ajax().sync().get('/values/validartimbrar', function(text, data){
-        var values = data.json()
-        if(!values.ok){
-            msg_error(values.msg)
-            $$('cmd_timbrar').disable()
-        }else{
-            if(values.msg){
-                msg_error(values.msg)
-            }
-            $$('cmd_timbrar').enable()
-        }
-    })
+    validar_timbrar()
 
     webix.ajax().sync().get('/values/configtimbrar', function(text, data){
         var values = data.json()
diff --git a/source/static/js/controller/main.js b/source/static/js/controller/main.js
index 3887849..1dfb30f 100644
--- a/source/static/js/controller/main.js
+++ b/source/static/js/controller/main.js
@@ -200,6 +200,7 @@ function multi_change(prevID, nextID){
         if(active == 'invoices_home'){
             current_dates()
             get_invoices()
+            validar_timbrar()
         }
         gi = $$('grid_invoices')
         return