Enforce lower_left in lattice geometry (openmc-dev#2982)

Co-authored-by: Paul Romano <[email protected]>
openmsr · Jul 18, 2024 · a7f2182 · a7f2182
1 parent aca99ec
commit a7f2182
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/openmc/lattice.py b/openmc/lattice.py
@@ -884,6 +884,10 @@ def create_xml_subelement(self, xml_element, memo=None):
         dimension = ET.SubElement(lattice_subelement, "dimension")
         dimension.text = ' '.join(map(str, self.shape))
 
+        # Make sure lower_left has been specified
+        if self.lower_left is None:
+            raise ValueError(f"Lattice {self.id} does not have lower_left specified.")
+
         # Export Lattice lower left
         lower_left = ET.SubElement(lattice_subelement, "lower_left")
         lower_left.text = ' '.join(map(str, self._lower_left))