diff --git a/ServiceFwUpdate/Documents/Cordonel Service FW-Update Drawingse.vsd b/ServiceFwUpdate/Documents/Cordonel Service FW-Update Drawingse.vsd
index c3bcc6e0..8030a676 100644
Binary files a/ServiceFwUpdate/Documents/Cordonel Service FW-Update Drawingse.vsd and b/ServiceFwUpdate/Documents/Cordonel Service FW-Update Drawingse.vsd differ
diff --git a/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.Designer.cs b/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.Designer.cs
index cc6170f2..6f3b5a9a 100644
--- a/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.Designer.cs
+++ b/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.Designer.cs
@@ -656,7 +656,7 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Installed LUT is equal to required LUT..
+        ///   Looks up a localized string similar to Installed LUT is equal to required..
         /// </summary>
         internal static string StrLutFileCompareSucceeded {
             get {
@@ -701,7 +701,7 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to ERROR: LUT is not in FW updae safe!.
+        ///   Looks up a localized string similar to ERROR: LUT is not in FW update safe!.
         /// </summary>
         internal static string StrLutFileNotDelivered {
             get {
diff --git a/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.resx b/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.resx
index 23882360..3dba6bd7 100644
--- a/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.resx
+++ b/ServiceFwUpdate/UI/ServiceFwUpdateSw/Properties/Resources.resx
@@ -620,13 +620,13 @@
     <value>ERROR: Installed LUT is unequal to required!</value>
   </data>
   <data name="StrLutFileCompareSucceeded" xml:space="preserve">
-    <value>Installed LUT is equal to required LUT.</value>
+    <value>Installed LUT is equal to required.</value>
   </data>
   <data name="StrLutFileFromSafeInvalid" xml:space="preserve">
     <value>ERROR: LUT from FW update safe invalid!</value>
   </data>
   <data name="StrLutFileNotDelivered" xml:space="preserve">
-    <value>ERROR: LUT is not in FW updae safe!</value>
+    <value>ERROR: LUT is not in FW update safe!</value>
   </data>
   <data name="StrLutFileReadoutFailed" xml:space="preserve">
     <value>ERROR: LUT readout failed!</value>
diff --git a/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs b/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
index fd722ebd..a9f5087f 100644
--- a/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
+++ b/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
@@ -2717,6 +2717,9 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
         /// <remarks date="2023-Nov-15..16" author="Thomas Wiedebusch">
         /// - Error state decides what to do next.
         /// </remarks>
+        /// <remarks date="2023-Nov-29" author="Thomas Wiedebusch">
+        /// - If LUT restore generates an error all processes have to be stopped as the meter is NOT functional.
+        /// </remarks>
         private void ErrorProcesses()
         {
             SetOverallProgressDisplayOff();
@@ -2770,9 +2773,11 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
                     _processState = GetNextProcessState(_invokerProcessState, _stateSequencePrepareMeterRelease);
                     break;
                 case ProcessState.RestoreLutFile:
-                    msg = Resources.StrLutFileRestoreFailed;
+                    //msg = Resources.StrLutFileRestoreFailed;
+                    msg = Resources.StrLutFileCompareFailed;
                     ErrorProcessCommon(msg);
-                    _processState = GetNextProcessState(_invokerProcessState, _stateSequencePrepareMeterRelease);
+                    // If LUT file is invalid all processes have to be stopped as the meter is NOT functional.
+                    _processState = ProcessState.Idle;
                     break;
                 case ProcessState.RecoverRegisters:
                     msg = Resources.StrRegisterRecoveryFailed;
@@ -4363,28 +4368,40 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
         /// <remarks date="2023-Nov-27" author="Thomas Wiedebusch">
         /// - Added check for string LutCrc is not null or empty.
         /// </remarks>
+        /// <remarks date="2023-Nov-28" author="Thomas Wiedebusch">
+        /// - Use installed FW version to decide if LUT is required.
+        /// </remarks>
         private void RestoreLutFile(ProcessState successExitState, ProcessState errorExitState = ProcessState.Error)
         {
             // Remind the invoker being able to generate error messages based on the last state
             _invokerProcessState = _processState;
             InfoProcessActive(lblLutFileCheck, Resources.StrLutFileRestoreActive, false);
 
-
-            // 1. LUT file is invalid indicated by CRC
-            if (!string.IsNullOrEmpty(_currentGenesis.LutCrc) && _currentGenesis.LutCrc.Contains(MeterLutFile.StrLutFileInvalidCrc))
+            //1. If InstalledFwVersion is below 1.2.xxx a LUT file is NOT required
+            if (_currentGenesis.InstalledFwVersion < 1200)
+            {
+                InfoProcessSuccess(lblLutFileCheck, Resources.StrLutFileNotNeeded);
+                _processState = successExitState;
+                LogText(Resources.StrLutFileNotNeeded);
+                return;
+            }
+            
+            // 2. LUT file is needed but invalid indicated by CRC or cannot be observed in file list
+            if ((!string.IsNullOrEmpty(_currentGenesis.LutCrc) && _currentGenesis.LutCrc.Contains(MeterLutFile.StrLutFileInvalidCrc))
+                || (_readMeterFiles != null && !_readMeterFiles.Any(f => f.Contains(MeterLutFile.StrLutMeterFileName))))
             {
                 InfoProcessFailed(lblLutFileCheck, Resources.StrLutFileNotInstalled);
                 _processState = errorExitState;
                 return;
             }
-            // 2. LUT file NOT installed:
+            // 3. LUT file NOT installed:
             //    If meter LUT CRC is not set and the meter files do not report the LUT, the meter does not have an
             //    installed LUT
             if ((string.IsNullOrEmpty(_currentGenesis.LutCrc) ||
                  _currentGenesis.LutCrc.Equals(Constants.StrUnknown)) &&
                 _readMeterFiles != null && !_readMeterFiles.Any(f => f.Contains(MeterLutFile.StrLutMeterFileName)))
             {
-                // 2. a) LUT file not installed but required by the FW update safe:
+                // 3. a) LUT file not installed but required by the FW update safe:
                 //       If the safe contains a LUT file, the installation of it has failed or it got lost during
                 //       update
                 if (_fwUpdateSafeLutFile != null)
@@ -4394,7 +4411,7 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
                     return;
                 }
 
-                // 2. b) LUT file not installed and not delivered by the FW update safe
+                // 3. b) LUT file not installed and not delivered by the FW update safe
                 //       This FW version does not require a LUT file
                 InfoProcessSuccess(lblLutFileCheck, Resources.StrLutFileNotNeeded);
                 _processState = successExitState;
@@ -4402,11 +4419,11 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
                 return;
             }
 
-            // 3. LUT file is installed:
-            // 3.a) Lut file is installed but NOT in the safe:
+            // 4. LUT file is installed:
+            // 4.a) Lut file is installed but NOT in the safe:
             //      If the LUT is not in the safe it cannot be restored or compared to the required content but can
             //      be analyzed and logged
-            // 3.b) LUT file is installed and delivered by the FW update safe:
+            // 4.b) LUT file is installed and delivered by the FW update safe:
             //      On validated installed LUT file in meter this can be compared with the required LUT file
             if (!ReadLogAndCompareMeterLutFile())
             {