From a392cc0863592df51afbb54424bd19314d459bb9 Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Sat, 31 Oct 2026 05:28:58 -0400
Subject: [PATCH] fix(cad-converter): skip the Dimensions fill during
 FilterPanel construction

AutoScroll runs a layout inside the constructor before dimensionsPanel
exists, so every CAD Converter form threw NullReferenceException.
---
 OpenNest/Controls/FilterPanel.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/OpenNest/Controls/FilterPanel.cs b/OpenNest/Controls/FilterPanel.cs
index b4e827ce..1f962b99 100644
--- a/OpenNest/Controls/FilterPanel.cs
+++ b/OpenNest/Controls/FilterPanel.cs
@@ -371,7 +371,8 @@ namespace OpenNest.Controls
         // shows every dimension instead of scrolling inside a short box.
         private void FillDimensionsToBottom()
         {
-            if (!dimensionsPanel.IsExpanded)
+            // Layout already runs inside the constructor (AutoScroll), before the sections exist.
+            if (dimensionsPanel is not { IsExpanded: true })
                 return;
 
             var above = 0;