issue7805.diff

diff --git a/tryton/modules/account/message.xml b/tryton/modules/account/message.xml
index df42c1d760..50b8dc4eda 100644
--- a/tryton/modules/account/message.xml
+++ b/tryton/modules/account/message.xml
@@ -139,6 +139,9 @@ this repository contains the full copyright notices and license terms. -->
 Use the current period to cancel the move?</field>
         </record>

+        <record model="ir.message" id="msg_move_template_invalid_description">
+            <field name="text">Failed to evaluate the description "%(description)s" from template "%(template)s" with error: "%(error)s"</field>
+        </record>
         <record model="ir.message" id="msg_move_template_invalid_expression">
             <field name="text">Failed to evaluate expression "%(expression)s" from template "%(template)s" with error:
 "%(error)s"</field>
diff --git a/tryton/modules/account/move_template.py b/tryton/modules/account/move_template.py
index 9699caa7ea..304ec9e2c9 100644
--- a/tryton/modules/account/move_template.py
+++ b/tryton/modules/account/move_template.py
@@ -58,8 +58,16 @@ class MoveTemplate(DeactivableMixin, ModelSQL, ModelView):
         if self.date:
             move.date = values.get(self.date)
         if self.description:
-            move.description = self.description.format(
-                **dict(Keyword.format_values(self, values)))
+            try:
+                move.description = self.description.format(
+                    **dict(Keyword.format_values(self, values)))
+            except (KeyError, ValueError) as e:
+                raise MoveTemplateExpressionError(
+                    gettext(
+                        'account.msg_move_template_invalid_description',
+                        description=self.description,
+                        template=self.rec_name,
+                        error=e)) from e
         move.lines = [l.get_line(values) for l in self.lines]

         return move