From ff04b63194dadca97bb9e932d676d735fef09621 Mon Sep 17 00:00:00 2001
From: hamed musallam <hamed.musallam@gmail.com>
Date: Tue, 30 Jun 2026 09:16:46 +0200
Subject: [PATCH 1/2] fix: do not look for matching signals if the spectrum
 does not exist

---
 src/component/panels/SummaryPanel/SummaryPanel.tsx | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/component/panels/SummaryPanel/SummaryPanel.tsx b/src/component/panels/SummaryPanel/SummaryPanel.tsx
index 4ad1950e8..eaa7430b1 100644
--- a/src/component/panels/SummaryPanel/SummaryPanel.tsx
+++ b/src/component/panels/SummaryPanel/SummaryPanel.tsx
@@ -153,6 +153,9 @@ function SummaryPanel() {
               link.experimentID,
               true,
             ) as Spectrum2D;
+
+            if (!spectrum) return false;
+
             return findSignalMatch1D(
               spectrum,
               link,
@@ -180,6 +183,9 @@ function SummaryPanel() {
           true,
         ) as Spectrum2D;
         // correlation is represented by a 2D signal
+
+        if (!spectrum) return false;
+
         if (
           findSignalMatch2D(
             spectrum,
@@ -201,6 +207,9 @@ function SummaryPanel() {
               link.experimentID,
               true,
             ) as Spectrum2D;
+
+            if (!spectrum) return false;
+
             return findSignalMatch2D(
               spectrum,
               link,

From bbd2f3d8e8a7093356e13394327f0d3d3ac20826 Mon Sep 17 00:00:00 2001
From: hamed musallam <hamed.musallam@gmail.com>
Date: Tue, 30 Jun 2026 10:11:01 +0200
Subject: [PATCH 2/2] refactor: use type guard

---
 .../panels/SummaryPanel/SummaryPanel.tsx      | 21 +++++++------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/src/component/panels/SummaryPanel/SummaryPanel.tsx b/src/component/panels/SummaryPanel/SummaryPanel.tsx
index eaa7430b1..8bf327fe4 100644
--- a/src/component/panels/SummaryPanel/SummaryPanel.tsx
+++ b/src/component/panels/SummaryPanel/SummaryPanel.tsx
@@ -10,6 +10,7 @@ import { getLinkDelta, getLinkDim } from 'nmr-correlation';
 import { memo, useCallback, useMemo, useState } from 'react';
 import { FaFlask, FaSlidersH } from 'react-icons/fa';
 
+import { isSpectrum2D } from '../../../data/data2d/Spectrum2D/isSpectrum2D.ts';
 import {
   findRange,
   findSignal1D,
@@ -148,13 +149,9 @@ function SummaryPanel() {
         // try to find a link which contains the belonging 2D signal in the spectra in view
         if (
           correlation.link.some((link: Link) => {
-            const spectrum = findSpectrum(
-              spectraData,
-              link.experimentID,
-              true,
-            ) as Spectrum2D;
+            const spectrum = findSpectrum(spectraData, link.experimentID, true);
 
-            if (!spectrum) return false;
+            if (!isSpectrum2D(spectrum)) return false;
 
             return findSignalMatch1D(
               spectrum,
@@ -181,10 +178,10 @@ function SummaryPanel() {
           spectraData,
           firstLink2D.experimentID,
           true,
-        ) as Spectrum2D;
+        );
         // correlation is represented by a 2D signal
 
-        if (!spectrum) return false;
+        if (!isSpectrum2D(spectrum)) return false;
 
         if (
           findSignalMatch2D(
@@ -202,13 +199,9 @@ function SummaryPanel() {
         // try to find a link which contains the belonging 2D signal in the spectra in view
         else if (
           correlation.link.some((link: any) => {
-            const spectrum = findSpectrum(
-              spectraData,
-              link.experimentID,
-              true,
-            ) as Spectrum2D;
+            const spectrum = findSpectrum(spectraData, link.experimentID, true);
 
-            if (!spectrum) return false;
+            if (!isSpectrum2D(spectrum)) return false;
 
             return findSignalMatch2D(
               spectrum,