diff --git a/GenesisCordonelInterface/API/InterfaceGCIToLaatzen.cs b/GenesisCordonelInterface/API/InterfaceGCIToLaatzen.cs
index b323f89e6..6de5e9c52 100644
--- a/GenesisCordonelInterface/API/InterfaceGCIToLaatzen.cs
+++ b/GenesisCordonelInterface/API/InterfaceGCIToLaatzen.cs
@@ -716,7 +716,7 @@ namespace GenesisCordonelInterface.API
 
                 if (!meter.IsLoggedOn)
                 {
-                    meter.Login();
+                    meter.Login2();
 
                     if (meter.IsLoggedOn)
                     {
@@ -738,7 +738,9 @@ namespace GenesisCordonelInterface.API
                         Success = false,
                         SlotId = slot,
                         IsLoggedOn = false,
-                        Message = "Login failed"
+                        Message = string.IsNullOrWhiteSpace(meter.LastLoginError)
+                                    ? "Login failed"
+                                    : meter.LastLoginError
                     };
                 }
 
@@ -788,7 +790,7 @@ namespace GenesisCordonelInterface.API
 
                 if (!meter.IsConnected)
                 {
-                    meter.ConnectMeter();
+                    meter.ConnectMeter2();
 
                     LogInfo(operation, $"New Slot {slot} connection success.");
 
@@ -796,21 +798,10 @@ namespace GenesisCordonelInterface.API
                     {
                         Success = true,
                         SlotId = slot,
-                        IsConnected = true,
-                        Message = "Connected now"
-                    };
-                }
-
-                if (!meter.IsConnected)
-                {
-                    LogInfo(operation, $"Failed Slot {slot} connection.");
-
-                    return new PublicModels.GciConnectResult
-                    {
-                        Success = false,
-                        SlotId = slot,
-                        IsConnected = false,
-                        Message = "Connect failed"
+                        IsConnected = meter.IsConnected,
+                        Message = meter.IsConnected
+                                    ? "Connected now"
+                                    : meter.LastConnectError
                     };
                 }
 
diff --git a/TBF/Rig/BridgeComponents/GciBridge/GciBridge.cs b/TBF/Rig/BridgeComponents/GciBridge/GciBridge.cs
index e9c6c39be..f9dbac1bc 100644
--- a/TBF/Rig/BridgeComponents/GciBridge/GciBridge.cs
+++ b/TBF/Rig/BridgeComponents/GciBridge/GciBridge.cs
@@ -467,7 +467,7 @@ namespace TBF.Rig.BridgeComponents.GciBridge
         ///     -> InterfaceOutsideToGCI.ConnectOneSlotAsync()
         ///         -> InterfaceGCIToLaatzen.ConnectOneMeterAsync()
         ///             -> per-slot GCI worker
-        ///                 -> MeterBatch.MetersLogin()
+        ///                 -> Protocols connect to ports
         ///                 -> GenesisMeter register snapshot
         /// </summary>
         /// <param name="slotId">Slot number.</param>
@@ -489,11 +489,34 @@ namespace TBF.Rig.BridgeComponents.GciBridge
             return result;
         }
 
-        public Task<GciPublicModels.GciLoginResult> LoginAsync(
-    int slot,
-    CancellationToken token = default)
+        /// <summary>
+        /// Logs in to the meter assigned to the requested slot.
+        /// 
+        /// Trace:
+        /// GciBridge.LoginAsync()
+        ///     -> InterfaceOutsideToGCI.LoginOneSlotAsync()
+        ///         -> InterfaceGCIToLaatzen.LoginOneMeterAsync()
+        ///             -> per-slot GCI worker
+        ///                 -> MeterBatch.MetersLogin()
+        ///                 -> GenesisMeter login state
+        /// </summary>
+        /// <param name="slotId">Slot number.</param>
+        /// <param name="token">Cancellation token.</param>
+        /// <returns>Login result for the requested slot.</returns>
+        public async Task<GciPublicModels.GciLoginResult> LoginAsync(
+            int slotId,
+            CancellationToken token = default)
         {
-            return gciExternalInterface.LoginOneSlotAsync(slot, token);
+            EnsureExternalInterface();
+
+            if (slotId <= 0)
+                throw new ArgumentException("Invalid slot id.");
+
+            var result = await gciExternalInterface.LoginOneSlotAsync(slotId, token);
+
+            log.InfoFormat("{0}: LoginAsync({1}) invoked. Result={2}", Name, slotId, result);
+
+            return result;
         }
 
         /// <summary>
diff --git a/TBF/TBF.csproj b/TBF/TBF.csproj
index f44b81f7d..35fbed894 100644
--- a/TBF/TBF.csproj
+++ b/TBF/TBF.csproj
@@ -4434,10 +4434,6 @@
       <Project>{439D0878-C76E-452B-B17D-209A89E91D36}</Project>
       <Name>Dirichlet.Numerics</Name>
     </ProjectReference>
-    <ProjectReference Include="..\ExternalProjects\Laatzen\Genesis\Common\CommonCore\CommonCore.csproj">
-      <Project>{1b02c79e-0b19-43e2-8f6b-71ef0c786c97}</Project>
-      <Name>CommonCore</Name>
-    </ProjectReference>
     <ProjectReference Include="..\GemCard\GemCard.csproj">
       <Project>{8B10D15A-39DE-4B56-8DD1-710C1EB3A697}</Project>
       <Name>GemCard</Name>