From f38805e6f1c98138db1617c2fa56f9007207d456 Mon Sep 17 00:00:00 2001
From: Vishnu Suresh Perumbavoor
 <63797249+vishnusureshperumbavoor@users.noreply.github.com>
Date: Wed, 16 Jul 2025 22:42:47 +0530
Subject: [PATCH] fix(segmentation): Fix segmentationid undefined 5106 (#5107)

---
 extensions/cornerstone/src/commandsModule.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/extensions/cornerstone/src/commandsModule.ts b/extensions/cornerstone/src/commandsModule.ts
index c1991e17a..f51c6ffe5 100644
--- a/extensions/cornerstone/src/commandsModule.ts
+++ b/extensions/cornerstone/src/commandsModule.ts
@@ -1888,6 +1888,9 @@ function commandsModule({
       const { segmentationService } = servicesManager.services;
       const { activeViewportId } = viewportGridService.getState();
       const activeSegmentation = segmentationService.getActiveSegmentation(activeViewportId);
+      if (!activeSegmentation) {
+        return;
+      }
       segmentationService.addSegment(activeSegmentation.segmentationId);
     },
     loadSegmentationDisplaySetsForViewport: ({ viewportId, displaySetInstanceUIDs }) => {