From 32f8c4c4654182bdf290e273529a7cd7c2a8eb52 Mon Sep 17 00:00:00 2001
From: timryanb <41971846+timryanb@users.noreply.github.com>
Date: Fri, 10 Jul 2026 14:19:21 +0000
Subject: [PATCH] Fix non-deterministic boundary node ordering in panel-type
 constraints

---
 tacs/constraints/panel_length.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tacs/constraints/panel_length.py b/tacs/constraints/panel_length.py
index 952eb33cd..cde4b24c3 100644
--- a/tacs/constraints/panel_length.py
+++ b/tacs/constraints/panel_length.py
@@ -755,8 +755,8 @@ def _getComponentBoundaryNodes(self, compIDs):
                                     allEdges.add(key)
                                 else:
                                     dupEdges.add(key)
-                # Now get a list of all the edges that aren't duplicated, these are the boundary edges
-                boundaryEdges = list(allEdges - dupEdges)
+                # Now get a sorted list of all the edges that aren't duplicated, these are the boundary edges
+                boundaryEdges = sorted(allEdges - dupEdges)
 
                 # Create a nodeToElem Pointer using a dictionary:
                 nodeToElem = {}