diff --git a/.changeset/large-pianos-appear.md b/.changeset/large-pianos-appear.md
new file mode 100644
index 00000000..7fe4ba40
--- /dev/null
+++ b/.changeset/large-pianos-appear.md
@@ -0,0 +1,5 @@
+---
+'@equinor/esv-intersection': patch
+---
+
+handle empty nested data when trying to find a sample
diff --git a/.prettierignore b/.prettierignore
index 3e14ff53..f9f41fa9 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,3 +1,4 @@
 .storybook/src/esv-intersection-data
 docs_out
 dist
+.direnv
diff --git a/src/datautils/findsample.ts b/src/datautils/findsample.ts
index 02b17ef8..d93dc5cc 100644
--- a/src/datautils/findsample.ts
+++ b/src/datautils/findsample.ts
@@ -1,26 +1,34 @@
 export function findIndexOfSample(data: number[][], pos: number): number {
+  if (data.length < 2) {
+    return -1;
+  }
+
+  const linearSearchLimit = 20;
   let a = 0;
   let b = data.length - 1;
-  const linearSearchLimit = 20;
-  let aPos = data[a][0];
-  let bPos = data[b][0];
+  let aPos = data[a]?.[0];
+  let bPos = data[b]?.[0];
 
   while (b - a > linearSearchLimit) {
     const splitAt = Math.floor((b + a) / 2);
-    const splitPos = data[splitAt][0];
+    const splitPos = data[splitAt]?.[0];
+
+    if (aPos == null || bPos == null || splitPos == null) {
+      return -1;
+    }
 
     if (pos >= aPos && pos < splitPos) {
       b = splitAt;
-      bPos = data[b][0];
+      bPos = data[b]?.[0];
     } else if (pos >= splitPos && pos <= bPos) {
       a = splitAt;
-      aPos = data[a][0];
+      aPos = data[a]?.[0];
     } else if (pos <= aPos && pos > splitPos) {
       b = splitAt;
-      bPos = data[b][0];
+      bPos = data[b]?.[0];
     } else if (pos <= splitPos && pos >= bPos) {
       a = splitAt;
-      aPos = data[a][0];
+      aPos = data[a]?.[0];
     } else {
       return -1;
     }
@@ -28,9 +36,9 @@ export function findIndexOfSample(data: number[][], pos: number): number {
 
   let index = -1;
   for (let i = a; i < b; i++) {
-    const v1 = data[i][0];
-    const v2 = data[i + 1][0];
-    if (Math.min(v1, v2) <= pos && pos <= Math.max(v1, v2)) {
+    const v1 = data[i]?.[0];
+    const v2 = data[i + 1]?.[0];
+    if (v1 != null && v2 != null && Math.min(v1, v2) <= pos && pos <= Math.max(v1, v2)) {
       index = i;
       break;
     }
diff --git a/vitest.config.ts b/vitest.config.ts
index 1f6b5ff0..d81dea09 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -9,6 +9,7 @@ export default mergeConfig(
   viteConfig,
   defineConfig({
     test: {
+      include: ['(src|test)/**/__tests__/**/*.?(c|m)[jt]s?(x)', '(src|test)/**/?(*.){test,spec}.?(c|m)[jt]s?(x)'],
       environment: 'jsdom',
       watch: false,
       setupFiles: ['./__mocks__/pixi.js.ts', '__mocks__/canvas.ts'],