diff --git a/.env.development b/.env.development
index 689bea5..3aec692 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.593
+NEXT_PUBLIC_APP_VERSION=1.6.594
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index e43dea8..2ba69e7 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.593
+NEXT_PUBLIC_APP_VERSION=1.6.594
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a6be4b..71614f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+## [1.6.594] – 2025-07-11
+
+- feat(api): Zeitraum und Eingang als Pflichtparameter für AnalogInputs-API eingeführt
+
+- API-Handler für /api/cpl/getAnalogInputsHistory überarbeitet
+- `zeitraum` (DIA0, DIA1, DIA2) und `eingang` (1–8) sind jetzt Pflichtfelder
+- Bei fehlenden oder ungültigen Parametern strukturierte Fehlerantwort mit Beispielen
+- Daten werden nun gezielt pro Eingang und Zeitraum geladen (z. B. AE3 + DIA1)
+- Bessere Fehlerbehandlung bei nicht vorhandenen Dateien
+
+---
 ## [1.6.593] – 2025-07-11
 
 - fix: Von/Bis-Datum beim Schließen des DetailModals zurücksetzen
diff --git a/package-lock.json b/package-lock.json
index d127405..a0e0227 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.593",
+  "version": "1.6.594",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.593",
+      "version": "1.6.594",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@headlessui/react": "^2.2.4",
diff --git a/package.json b/package.json
index 661ea24..a5b03e6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.593",
+  "version": "1.6.594",
   "private": true,
   "scripts": {
     "dev": "next dev",
diff --git a/pages/api/cpl/getAnalogInputsHandler.ts b/pages/api/cpl/getAnalogInputsHandler.ts
index 76a364b..eda6613 100644
--- a/pages/api/cpl/getAnalogInputsHandler.ts
+++ b/pages/api/cpl/getAnalogInputsHandler.ts
@@ -5,8 +5,6 @@ import fs from "fs";
 import path from "path";
 
 export default function handler(req: NextApiRequest, res: NextApiResponse) {
-  const mode = process.env.NEXT_PUBLIC_CPL_MODE;
-
   try {
     const filePath = path.join(
       process.cwd(),
diff --git a/pages/api/cpl/getDigitalOutputsHandler.ts b/pages/api/cpl/getDigitalOutputsHandler.ts
index 469d025..4c53db7 100644
--- a/pages/api/cpl/getDigitalOutputsHandler.ts
+++ b/pages/api/cpl/getDigitalOutputsHandler.ts
@@ -8,8 +8,6 @@ export default async function handler(
   req: NextApiRequest,
   res: NextApiResponse
 ) {
-  const mode = process.env.NEXT_PUBLIC_CPL_MODE ?? "json";
-
   // Lese JSON-Datei z.B. digitalOutputsMockData.json
   const filePath = path.join(
     process.cwd(),
diff --git a/pages/api/cpl/updateAnalogInputsSettingsHandler.ts b/pages/api/cpl/updateAnalogInputsSettingsHandler.ts
index 1d6586a..9e56768 100644
--- a/pages/api/cpl/updateAnalogInputsSettingsHandler.ts
+++ b/pages/api/cpl/updateAnalogInputsSettingsHandler.ts
@@ -8,7 +8,6 @@ export default function handler(req: NextApiRequest, res: NextApiResponse) {
     return res.status(405).json({ error: "Method not allowed" });
   }
 
-  const mode = process.env.NEXT_PUBLIC_CPL_MODE;
   const updates = req.body.updates;
 
   if (!Array.isArray(updates)) {
diff --git a/redux/thunks/getAnalogInputsChartDataThunk.ts b/redux/thunks/getAnalogInputsChartDataThunk.ts
index 8f9c115..2b31af5 100644
--- a/redux/thunks/getAnalogInputsChartDataThunk.ts
+++ b/redux/thunks/getAnalogInputsChartDataThunk.ts
@@ -6,15 +6,15 @@ export const getAnalogInputsChartDataThunk = createAsyncThunk(
   "analogInputsChart/fetchChartData",
   async (_, { getState }) => {
     const state = getState() as RootState;
-    const { zeitraum, vonDatum, bisDatum } = state.analogInputsChart;
+    //const { zeitraum, vonDatum, bisDatum } = state.analogInputsChart;
     const selectedInput = state.selectedAnalogInput;
 
     if (!selectedInput) return [];
 
-    const res = await fetch(
+    /*   const res = await fetch(
       `/api/cpl/getAnalogInputsHistory?inputId=${selectedInput.id}&zeitraum=${zeitraum}&von=${vonDatum}&bis=${bisDatum}`
     );
     const data = await res.json();
-    return data;
+    return data; */
   }
 );