diff --git a/aeat.py b/aeat.py
index b81fcb5..57940b5 100644
--- a/aeat.py
+++ b/aeat.py
@@ -437,6 +437,8 @@ class SIIReport(Workflow, ModelSQL, ModelView):
         ReportLine = pool.get('aeat.sii.report.lines')
 
         for report in reports:
+            if report.lines:
+                continue
             domain = [
                 ('sii_book_key', '=', report.book),
                 ('move.period', '=', report.period.id),
@@ -444,10 +446,11 @@ class SIIReport(Workflow, ModelSQL, ModelView):
             ]
 
             if report.operation_type == 'A0':
-                domain.append(('sii_state', '=', None))
+                domain.append(('sii_state', 'in', [None, 'Incorrecto']))
+
             elif report.operation_type in ('A1', 'A4'):
                 domain.append(('sii_state', 'in', [
-                    'ACEPTADOCONERRORES', 'INCORRECTO']))
+                    'AceptadoConErrores', 'AceptadaConErrores']))
 
             _logger.debug('Searching invoices for SII report: %s', domain)
             invoices = Invoice.search(domain)
diff --git a/invoice.py b/invoice.py
index 1d8741a..df340db 100644
--- a/invoice.py
+++ b/invoice.py
@@ -83,14 +83,26 @@ class Invoice:
             invoices.append(invoice)
             lines.append(id_)
 
-        if clause[-1] == None:
-            return [('id', 'not in', invoices)]
+        is_none = False
+        c = clause[-1]
+        if isinstance(clause[-1], list):
+            if None in clause[-1]:
+                is_none = True
+                c.remove(None)
+
+        c0 = []
+        if clause[-1] == None or is_none:
+            c0 = [('id', 'not in', invoices)]
 
         clause2 = [tuple(('state',)) + tuple(clause[1:])] + \
-            [('id', 'in', lines)]
+                [('id', 'in', lines)]
 
         res_lines = SIILines.search(clause2)
-        return [('id', 'in', [x.invoice.id for x in res_lines])]
+
+        if is_none:
+            return ['OR', c0, [('id', 'in', [x.invoice.id for x in res_lines])]]
+        else:
+            return [('id', 'in', [x.invoice.id for x in res_lines])]
 
     @classmethod
     def get_sii_state(cls, invoices, names):