diff --git a/src/gui_qt/fit/fit_parameter.py b/src/gui_qt/fit/fit_parameter.py
index fb36072..682893e 100644
--- a/src/gui_qt/fit/fit_parameter.py
+++ b/src/gui_qt/fit/fit_parameter.py
@@ -181,7 +181,11 @@ class QFitParameterWidget(QtWidgets.QWidget, Ui_FormFit):
         for i, value in enumerate(self.data_values[sid]):
             w = self.data_parameter[i]
             w.blockSignals(True)
-            w.show_as_local_parameter(value is not None)
+            try:
+                w.show_as_local_parameter(value is not None)
+            except AttributeError:
+                pass
+
             if value is None:
                 w.value = self.glob_values[i]
             else: