Common\..\RegisterRestorer: - multiple reading of final registers

Common/Hardware/WaterMeter/Genesis/GenesisCore/RegisterRestorer.cs

@@ -510,7 +510,8 @@ namespace Xylem.Common.Hardware.WaterMeter.Genesis.GenesisCore
                     }
                     finally
                     {
-                        var actualProcessMsg = $"{Resources.StrRegisterCompare}: {strRequiredRegisterValue} ";
+                        var actualProcessMsg = string.IsNullOrEmpty(strRequiredRegisterValue) ? "": 
+                            $"{Resources.StrRegisterCompare}: {strRequiredRegisterValue} ";
 
                         OnProcessUpdate?.Invoke(this, new ProcessExecEventArgs($@"{Resources.StrRegisterCompare}" +
                             $@" {ActualRegisterCtr} / {registersCount}",
@@ -549,16 +550,15 @@ namespace Xylem.Common.Hardware.WaterMeter.Genesis.GenesisCore
         /// <remarks date="2023-Nov-21" author="Thomas Wiedebusch">
         /// - Return false if PcbId between initial- and final-read does NOT match return false.
         /// </remarks>
+        /// <remarks date="2023-Nov-30" author="Thomas Wiedebusch">
+        /// - Allow final read out as often as called even if done before.
+        /// </remarks>
         public Boolean FinalReadRegisters()
         {
             if (_currentGenesis == null)
                 return false;
 
-            // deny update of registers if already done
-            if (_pcbIdFinalRegisterRead == _currentGenesis.PcbId)
-                return true;
-
-            _pcbIdFinalRegisterRead = _currentGenesis.PcbId;
+             _pcbIdFinalRegisterRead = _currentGenesis.PcbId;
             // clear the contents of the restore registers if the water meter backed up was not identical 
             if (_pcbIdInitialRegisterRead != _pcbIdFinalRegisterRead)
             {