diff --git a/lotemplate/CalcTemplate.py b/lotemplate/CalcTemplate.py
index d47f91e..ba6a7e6 100644
--- a/lotemplate/CalcTemplate.py
+++ b/lotemplate/CalcTemplate.py
@@ -92,7 +92,7 @@ def search_error(self, json_vars: dict[str, dict[str, Union[str, list[str]]]]) -
            self.close()
            raise errors.JsonComparaisonError(
                 'missing_required_variable',
-                f"There is one or more missing variables in the json",
+                f"There is one or more missing variables in the json {repr(notdiff)}",
                 {"error" : repr(notdiff)}
             )