diff --git a/AgroBase/OperationControl/Models/TcpVideoReceiver.cs b/AgroBase/OperationControl/Models/TcpVideoReceiver.cs
index 950a1799a..c36cf6511 100644
--- a/AgroBase/OperationControl/Models/TcpVideoReceiver.cs
+++ b/AgroBase/OperationControl/Models/TcpVideoReceiver.cs
@@ -874,7 +874,7 @@ namespace OperationControl.Models
             if (client == null)
                 return;
 
-            try { client.Client.Shutdown(SocketShutdown.Both); } catch { }
+            try { client.Client?.Shutdown(SocketShutdown.Both); } catch { }
             try { client.Close(); } catch { }
         }
 
diff --git a/AgroBase/OperationControl/ViewModels/Views/Operacao/Monitoramento/ParametrizacaoViewModel.cs b/AgroBase/OperationControl/ViewModels/Views/Operacao/Monitoramento/ParametrizacaoViewModel.cs
index bf2c31d3b..e6d341c97 100644
--- a/AgroBase/OperationControl/ViewModels/Views/Operacao/Monitoramento/ParametrizacaoViewModel.cs
+++ b/AgroBase/OperationControl/ViewModels/Views/Operacao/Monitoramento/ParametrizacaoViewModel.cs
@@ -61,7 +61,8 @@ namespace OperationControl.ViewModels.Views.Operacao.Monitoramento
             modoOperacaoAtual = p.Modo;
             p.Descricao = $"{p.Modo} - Padrão";
             Parametros = p;
-            VariaveisControleOperacao.RoverEmFoco.Modo = modo;
+            if (VariaveisControleOperacao.RoverEmFoco != null)
+                VariaveisControleOperacao.RoverEmFoco.Modo = modo;
         }
 
         private void ReiniciarOperacao()