diff --git a/components/Apps/FixedPositionBox/FixedTrainBox.tsx b/components/Apps/FixedPositionBox/FixedTrainBox.tsx
index 431953c..86b1ce3 100644
--- a/components/Apps/FixedPositionBox/FixedTrainBox.tsx
+++ b/components/Apps/FixedPositionBox/FixedTrainBox.tsx
@@ -34,7 +34,7 @@ export const FixedTrain: FC<props> = ({
   displaySize,
   setDisplaySize,
 }) => {
-  const { setFixedPosition, currentTrain, getCurrentStationData, getPosition } =
+  const {fixedPosition, setFixedPosition, currentTrain, getCurrentStationData, getPosition } =
     useCurrentTrain();
 
   const { mapSwitch } = useTrainMenu();
@@ -51,9 +51,14 @@ export const FixedTrain: FC<props> = ({
   }, [currentTrain, trainID]);
   useEffect(() => {
     const stationData = getCurrentStationData(trainID);
+    console.log(stationData);
     if (stationData) {
       setTrain(stationData);
     }
+    else{
+      alert("追跡していた列車が消えました。追跡を終了します。");
+      setFixedPosition({ type: null, value: null });
+    }
   }, [trainID, currentTrain]);
 
   const { getStationDataFromName, stationList, originalStationList } =
diff --git a/stateBox/useStationList.tsx b/stateBox/useStationList.tsx
index faf8662..9b3e737 100644
--- a/stateBox/useStationList.tsx
+++ b/stateBox/useStationList.tsx
@@ -74,10 +74,15 @@ export const StationListProvider: FC<Props> = ({ children }) => {
     Object.keys(originalStationList).forEach((key) => {
       originalStationList[key].forEach((station) => {
         if (!station.StationNumber) return;
-        if (typeof station.StationNumber === "string" && station.StationNumber.includes(name)) {
+        if (
+          typeof station.StationNumber === "string" &&
+          station.StationNumber.includes(name)
+        ) {
           if (!!station.jslodApi) returnArray.push(station);
-        }
-        else if (typeof station.Station_JP === "string" && station.Station_JP.includes(name)) {
+        } else if (
+          typeof station.Station_JP === "string" &&
+          station.Station_JP.includes(name)
+        ) {
           if (!!station.jslodApi) returnArray.push(station);
         }
       });
@@ -122,6 +127,7 @@ export const StationListProvider: FC<Props> = ({ children }) => {
         });
       }
     });
+    if (bootStationList[0].line === undefined) return "";
     return `MoveDisplayStation('${bootStationList[0].line}_${bootStationList[0].station.MyStation}_${bootStationList[0].station.Station_JP}');document.getElementById("disp").insertAdjacentHTML("afterbegin", "<div />");setReload();`;
   };