diff --git a/BeWo/View/Controls/GkvAbrechnungDetailControl.xaml b/BeWo/View/Controls/GkvAbrechnungDetailControl.xaml
index 04e2ce4eb..c69e46851 100644
--- a/BeWo/View/Controls/GkvAbrechnungDetailControl.xaml
+++ b/BeWo/View/Controls/GkvAbrechnungDetailControl.xaml
@@ -58,7 +58,7 @@
                         Grid.Row="0"
                         Grid.Column="2"
                         Margin="3"
-                        IsReadOnly="True"
+                        IsEnabled="False"
                         Text="{Binding GkvAbrechnungOid}" />
                     <Label
                         Grid.Row="5"
@@ -69,7 +69,7 @@
                         Grid.Row="5"
                         Grid.Column="2"
                         Margin="3"
-                        IsReadOnly="True"
+                        IsEnabled="False"
                         Text="{Binding AbrechnungsZeitraumStart}" />
                     <Label
                         Grid.Row="6"
@@ -80,7 +80,7 @@
                         Grid.Row="6"
                         Grid.Column="2"
                         Margin="3"
-                        IsReadOnly="True"
+                        IsEnabled="False"
                         Text="{Binding AbrechnungsZeitraumEnde}" />
                     <Label
                         Grid.Row="9"
@@ -91,7 +91,7 @@
                         Grid.Row="9"
                         Grid.Column="2"
                         Margin="3"
-                        IsReadOnly="True"
+                        IsEnabled="False"
                         Text="{Binding ErstelltAm}" />
                     <Label
                         Grid.Row="10"
@@ -103,6 +103,7 @@
                         Grid.Row="10"
                         Grid.Column="2"
                         Margin="3"
+                        IsEnabled="False"
                         Orientation="Horizontal">
                         <RadioButton
                             Margin="3"
@@ -157,7 +158,7 @@
                         Grid.Row="15"
                         Grid.Column="2"
                         Margin="3"
-                        IsReadOnly="True"
+                        IsEnabled="False"
                         Text="{Binding Betrag, StringFormat={}{0:0.00 €}}" />
                     <!--<TextBox    Grid.Row="15" Grid.Column="2" Margin="3" IsReadOnly="True" Text="{Binding Bezahlt}"/>-->
                     <Label
diff --git a/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs b/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
index 57a1a0086..736b25b12 100644
--- a/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
+++ b/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
@@ -43,6 +43,7 @@ namespace BeWo.View.Detail.Accounting
             DownloadLinkEngine = new DownloadLinkEngine();
 
             _Viewmodel = new GkvAbrechnungListVM();
+            _Viewmodel.VMList.ListChanged += (s, e) => gridView.BestFitColumns();
 
             DataContext = _Viewmodel;
 
@@ -111,8 +112,6 @@ namespace BeWo.View.Detail.Accounting
                    CriteriaOperator.FromLambda<GkvAbrechnungDC>(gkv => gkv.AbrechnungsZeitraumStart <= filter_start && filter_ende <= gkv.AbrechnungsZeitraumEnde));
                 }
             }
-
-            gridView.BestFitColumns();
         }
 
         private void NewGkvAbrechnungPopUpViewCancelButtonClicked(object sender, EventArgs e)
diff --git a/Service/ServiceImplementations/AccountingServiceImp.cs b/Service/ServiceImplementations/AccountingServiceImp.cs
index 6321a5c48..bd127e50d 100644
--- a/Service/ServiceImplementations/AccountingServiceImp.cs
+++ b/Service/ServiceImplementations/AccountingServiceImp.cs
@@ -1176,7 +1176,10 @@ namespace BeWo.Service.ServiceImplementations
 			}
 
 			if (!response_app8.Success)
-				throw new GkvException(response_app8.Message);
+				throw new GkvException("Success false - " + response_app8.Message);
+			
+			if (response_app8.Results is null)
+				throw new GkvException("Result null - " + response_app8.Message);
 
 			var results = response_app8.Results.Where(x => x is object);