Merge commit 'd1f24cf6' into remed/lane-K

src/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.Modbus.Cli/Commands/ReadCommand.cs

@@ -57,6 +57,14 @@ public sealed class ReadCommand : ModbusCommandBase
         ValidateEndpoint();
         var ct = console.RegisterCancellationHandler();
 
+        // The driver's tag factory refuses an incompatible region/type pair (the tag would read
+        // BadNodeIdUnknown) — say why up front instead.
+        if (!ModbusTagDefinitionFactory.IsRegionTypeCompatible(Region, DataType))
+            throw new CliFx.Exceptions.CommandException(
+                Region is ModbusRegion.Coils or ModbusRegion.DiscreteInputs
+                    ? $"Region '{Region}' only carries Bool values (--type Bool); got '{DataType}'."
+                    : $"Region '{Region}' carries register types; use --type BitInRegister for a bit of a register, not '{DataType}'.");
+
         var tagName = SynthesiseTagName(Region, Address, DataType);
         var tag = new ModbusTagDefinition(
             Name: tagName,

src/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.Modbus.Cli/Commands/WriteCommand.cs

@@ -74,6 +74,9 @@ public sealed class WriteCommand : ModbusCommandBase
             throw new CliFx.Exceptions.CommandException(
                 $"Region 'Coils' only supports boolean values (--type Bool). " +
                 $"Type '{DataType}' cannot represent a single-bit coil write.");
+        if (!ModbusTagDefinitionFactory.IsRegionTypeCompatible(Region, DataType))
+            throw new CliFx.Exceptions.CommandException(
+                $"Region '{Region}' carries register types; use --type BitInRegister for a bit of a register, not '{DataType}'.");
 
         var tagName = ReadCommand.SynthesiseTagName(Region, Address, DataType);
         var tag = new ModbusTagDefinition(