diff --git a/extensions/src/doodlebot/LineFollowing.ts b/extensions/src/doodlebot/LineFollowing.ts
index 17d3a74d8..640c2819d 100644
--- a/extensions/src/doodlebot/LineFollowing.ts
+++ b/extensions/src/doodlebot/LineFollowing.ts
@@ -545,9 +545,18 @@ export function followLine(previousLine: Point[], pixels: Point[], next: Point[]
     if (test) {
         x3 = spline.xs[0];
     } else {
-        x3 = start;
+        x3 = spline.xs[0];
+    }
+    const splineValue = spline.at(x3);
+    if (typeof splineValue === 'undefined') {
+        // Handle the error case - either return early or use a default value
+        return {
+            motorCommands: [],
+            bezierPoints: [],
+            line: []
+        };
     }
-    const point3 = { x: spline.at(x3), y: x3 }
+    const point3 = { x: splineValue, y: x3 };
 
     // Find the x offset to correct
     const reference1 = [spline.at(spline.xs[0]), 0] // First point should be very close to 0