Allow insert on top of marker

xsuite · Feb 3, 2023 · 15e5e52 · 15e5e52
1 parent e9468e5
commit 15e5e52
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/xtrack/line.py b/xtrack/line.py
@@ -622,6 +622,7 @@ def insert_element(self, index=None, element=None, name=None, at_s=None,
             for ii in range(i_first_drift_to_cut, i_last_drift_to_cut+1):
                 e_to_replace = self.element_dict[self.element_names[ii]]
                 if (not _is_drift(e_to_replace) and
+                    not isinstance(e_to_replace, Marker) and
                     not e_to_replace.__class__.__name__.startswith('Limit')):
                     raise ValueError('Cannot replace active element '
                                         f'{self.element_names[ii]}')