diff --git a/tryton/action/main.py b/tryton/action/main.py
index 66f6c739bd..ec681af28d 100644
--- a/tryton/action/main.py
+++ b/tryton/action/main.py
@@ -58,7 +58,7 @@ class Action(object):
         if not action_type:
             res = False
             try:
-                res = RPCExecute('model', 'ir.action', 'read', act_id,
+                res, = RPCExecute('model', 'ir.action', 'read', [act_id],
                     ['type'], context=context)
             except RPCException:
                 return
@@ -66,7 +66,7 @@ class Action(object):
                 raise Exception('ActionNotFound')
             action_type = res['type']
         try:
-            res = RPCExecute('model', action_type, 'search_read',
+            res, = RPCExecute('model', action_type, 'search_read',
                 [('action', '=', act_id)], 0, 1, None, None,
                 context=context)
         except RPCException:
diff --git a/tryton/gui/window/board.py b/tryton/gui/window/board.py
index e1ed1719ed..2899614373 100644
--- a/tryton/gui/window/board.py
+++ b/tryton/gui/window/board.py
@@ -42,8 +42,8 @@ class Board(SignalEvent, TabContent):
         super(Board, self).__init__()
 
         try:
-            view = RPCExecute('model', 'ir.ui.view', 'read',
-                view_id, ['arch'], context=context)
+            view, = RPCExecute('model', 'ir.ui.view', 'read',
+                [view_id], ['arch'], context=context)
         except RPCException:
             raise
 
diff --git a/tryton/gui/window/view_form/model/field.py b/tryton/gui/window/view_form/model/field.py
index 04f864ae7c..a2009cb2a5 100644
--- a/tryton/gui/window/view_form/model/field.py
+++ b/tryton/gui/window/view_form/model/field.py
@@ -420,8 +420,8 @@ class M2OField(CharField):
                 value = None
         if not rec_name and value >= 0:
             try:
-                result = RPCExecute('model', self.attrs['relation'], 'read',
-                    value, ['rec_name'])
+                result, = RPCExecute('model', self.attrs['relation'], 'read',
+                    [value], ['rec_name'])
             except RPCException:
                 return False
             rec_name = result['rec_name'] or ''
@@ -543,7 +543,7 @@ class O2MField(CharField):
                     get_readonly=readonly, get_modifiedonly=modified)
                 values.pop(parent_name, None)
                 if record2.modified and values:
-                    result.append(('write', record2.id, values))
+                    result.append(('write', [record2.id], values))
                 result[0][1].append(record2.id)
             else:
                 values = record2.get(check_load=check_load,
@@ -854,7 +854,7 @@ class ReferenceField(CharField):
         if ref_model and ref_id >= 0:
             if not rec_name and ref_id >= 0:
                 try:
-                    result = RPCExecute('model', ref_model, 'read', ref_id,
+                    result, = RPCExecute('model', ref_model, 'read', [ref_id],
                         ['rec_name'])
                 except RPCException:
                     return
diff --git a/tryton/gui/window/view_form/model/record.py b/tryton/gui/window/view_form/model/record.py
index 8fbc6abc82..e799874a36 100644
--- a/tryton/gui/window/view_form/model/record.py
+++ b/tryton/gui/window/view_form/model/record.py
@@ -285,9 +285,8 @@ class Record(SignalEvent):
                     context = context.copy()
                     context['_timestamp'] = self.get_timestamp()
                     try:
-                        if not RPCExecute('model', self.model_name, 'write',
-                                [self.id], value, context=context):
-                            return False
+                        RPCExecute('model', self.model_name, 'write',
+                            [self.id], value, context=context)
                     except RPCException:
                         return False
             self._loaded.clear()
@@ -352,8 +351,8 @@ class Record(SignalEvent):
 
     def rec_name(self):
         try:
-            return RPCExecute('model', self.model_name, 'read', self.id,
-                ['rec_name'], context=self.context_get())['rec_name']
+            return RPCExecute('model', self.model_name, 'read', [self.id],
+                ['rec_name'], context=self.context_get())[0]['rec_name']
         except RPCException:
             return ''
 
@@ -533,7 +532,7 @@ class Record(SignalEvent):
         if fieldnames:
             try:
                 result = RPCExecute('model', self.model_name, 'on_change_with',
-                    list(fieldnames), values, context=self.context_get())
+                    values, list(fieldnames), context=self.context_get())
             except RPCException:
                 return
             for fieldname, value in result.items():
diff --git a/tryton/gui/window/view_form/view/form_gtk/interface.py b/tryton/gui/window/view_form/view/form_gtk/interface.py
index ac5edef95d..b8f158d1c1 100644
--- a/tryton/gui/window/view_form/view/form_gtk/interface.py
+++ b/tryton/gui/window/view_form/view/form_gtk/interface.py
@@ -211,17 +211,17 @@ class TranslateDialog(NoModal):
                 )
             try:
                 value = RPCExecute('model', self.widget.record.model_name,
-                    'read', self.widget.record.id, [self.widget.field_name],
+                    'read', [self.widget.record.id], [self.widget.field_name],
                     context={'language': language['code']}
-                    )[self.widget.field_name]
+                    )[0][self.widget.field_name]
             except RPCException:
                 return
             context['fuzzy_translation'] = True
             try:
                 fuzzy_value = RPCExecute('model',
                     self.widget.record.model_name, 'read',
-                    self.widget.record.id, [self.widget.field_name],
-                    context=context)[self.widget.field_name]
+                    [self.widget.record.id], [self.widget.field_name],
+                    context=context)[0][self.widget.field_name]
             except RPCException:
                 return
             widget = self.widget.translate_widget()
@@ -276,7 +276,7 @@ class TranslateDialog(NoModal):
                     )
                 try:
                     RPCExecute('model', self.widget.record.model_name, 'write',
-                        self.widget.record.id, {
+                        [self.widget.record.id], {
                             self.widget.field_name: value,
                             }, context=context)
                 except RPCException: