diff --git a/ConfigCreator/MonoRepoUtils.vbproj b/ConfigCreator/MonoRepoUtils.vbproj
index ea310336..17a87333 100644
--- a/ConfigCreator/MonoRepoUtils.vbproj
+++ b/ConfigCreator/MonoRepoUtils.vbproj
@@ -161,5 +161,11 @@
     <Content Include="mail.ico" />
     <None Include="Resources\save as.svg" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Services.ZUGFeRDService\DDZUGFeRDService.vbproj">
+      <Project>{7deec36e-ea5f-4711-ad1e-fd8894f4ad77}</Project>
+      <Name>DDZUGFeRDService</Name>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.targets" />
 </Project>
\ No newline at end of file
diff --git a/Controls.ChatControl/ChatControl.vbproj b/Controls.ChatControl/ChatControl.vbproj
index a8980dc9..baade32c 100644
--- a/Controls.ChatControl/ChatControl.vbproj
+++ b/Controls.ChatControl/ChatControl.vbproj
@@ -177,5 +177,11 @@
   <ItemGroup>
     <None Include="Resources\action_add_16xLG.png" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Controls.ChatAddUser\ChatAddUser.vbproj">
+      <Project>{f0a807cc-be14-4b5b-9200-27c16156bd8a}</Project>
+      <Name>ChatAddUser</Name>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.targets" />
 </Project>
\ No newline at end of file
diff --git a/Controls.DocumentViewer/Classes/Search.vb b/Controls.DocumentViewer/Classes/Search.vb
index 882c48c1..68e73c10 100644
--- a/Controls.DocumentViewer/Classes/Search.vb
+++ b/Controls.DocumentViewer/Classes/Search.vb
@@ -35,15 +35,23 @@ Public Class Search
 
         ' Reset previous highlights, then search for the new query
         _Viewer.RemoveAllRegions()
-        _Viewer.SearchText(_CurrentQuery, 0, CaseSensitive, WholeWords)
+        DoSearchText()
+
+        ' Select the next occurrence
+        NextHighlight()
     End Sub
 
     Public Sub NextHighlight()
         ' This also applies when the page has *NO* occurrences, so 0 = 0
         If _CurrentOccurrenceCount = _CurrentSelectedOccurrence Then
             ' If there are no occurrences on the current page, got to the *next page*
-            While _CurrentOccurrenceCount = _CurrentSelectedOccurrence And _CurrentPage < _Viewer.PageCount
-                _Viewer.DisplayNextPage()
+            While _CurrentOccurrenceCount = _CurrentSelectedOccurrence And _CurrentPage <= _Viewer.PageCount
+                If _CurrentPage = _Viewer.PageCount Then
+                    _Viewer.DisplayFirstPage()
+                Else
+                    _Viewer.DisplayNextPage()
+                End If
+
             End While
 
             ' Safeguard against selecting a non-existing occurrence on the last page
@@ -61,8 +69,13 @@ Public Class Search
     Public Sub PrevHighlight()
         If _CurrentOccurrenceCount = 0 Or _CurrentSelectedOccurrence = 1 Then
 
-            While (_CurrentOccurrenceCount = 0 Or _CurrentSelectedOccurrence = 1) And _CurrentPage > 1
-                _Viewer.DisplayPreviousPage()
+            While (_CurrentOccurrenceCount = 0 Or _CurrentSelectedOccurrence = 1) And _CurrentPage >= 1
+                If _CurrentPage = 1 Then
+                    _Viewer.DisplayLastPage()
+                Else
+                    _Viewer.DisplayPreviousPage()
+                End If
+
             End While
 
             If _CurrentOccurrenceCount > 0 Then
@@ -73,26 +86,6 @@ Public Class Search
             ' Otherwise just select the previous occurrence
             SelectHighlight(_CurrentSelectedOccurrence - 1)
         End If
-
-        '' If no occurrence found on the current page,
-        '' skip to the *previous* page to look there
-        'If _CurrentOccurrenceCount = 0 Then
-        '    While _CurrentOccurrenceCount = 0 And _CurrentPage > 1
-        '        _Viewer.DisplayPreviousPage()
-        '    End While
-
-        'ElseIf _CurrentSelectedOccurrence = 1 Then
-        '    ' Need to switch to the previous *page*
-        '    ' and highlight the last occurrence there
-        '    If _CurrentPage > 1 Then
-        '        _Viewer.DisplayPreviousPage()
-
-        '        SelectHighlight(_CurrentOccurrenceCount)
-        '    End If
-        'Else
-        '    ' Otherwise just select the previous occurrence
-        '    SelectHighlight(_CurrentSelectedOccurrence - 1)
-        'End If
     End Sub
 
     Private Sub SelectHighlight(pOccurrence As Integer)
@@ -112,11 +105,15 @@ Public Class Search
             _CurrentPage = _Viewer.CurrentPage
 
             If _CurrentQuery.Length > 0 Then
-                _Viewer.SearchText(_CurrentQuery, 0, CaseSensitive, WholeWords)
-                _CurrentOccurrenceCount = _Viewer.GetTextOccurrenceCount(_CurrentPage, _CurrentQuery, CaseSensitive, WholeWords)
-                _CurrentSelectedOccurrence = 0
+                DoSearchText()
             End If
         End If
     End Sub
 
+    Private Sub DoSearchText()
+        _Viewer.SearchText(_CurrentQuery, 0, CaseSensitive, WholeWords)
+        _CurrentOccurrenceCount = _Viewer.GetTextOccurrenceCount(_CurrentPage, _CurrentQuery, CaseSensitive, WholeWords)
+        _CurrentSelectedOccurrence = 0
+    End Sub
+
 End Class
diff --git a/Controls.DocumentViewer/DocumentViewer.Designer.vb b/Controls.DocumentViewer/DocumentViewer.Designer.vb
index 9fd05382..4415a3da 100644
--- a/Controls.DocumentViewer/DocumentViewer.Designer.vb
+++ b/Controls.DocumentViewer/DocumentViewer.Designer.vb
@@ -63,7 +63,7 @@ Partial Class DocumentViewer
         Me.RepositoryItemSearchControl1 = New DevExpress.XtraEditors.Repository.RepositoryItemSearchControl()
         Me.SpreadsheetControl1 = New DevExpress.XtraSpreadsheet.SpreadsheetControl()
         Me.PrintDocument1 = New System.Drawing.Printing.PrintDocument()
-        Me.LabelControl1 = New DevExpress.XtraEditors.LabelControl()
+        Me.lbFileNotLoaded = New DevExpress.XtraEditors.LabelControl()
         CType(Me.BarManager1, System.ComponentModel.ISupportInitialize).BeginInit()
         CType(Me.RepositoryItemTextEdit2, System.ComponentModel.ISupportInitialize).BeginInit()
         CType(Me.RepositoryItemTextEdit3, System.ComponentModel.ISupportInitialize).BeginInit()
@@ -139,7 +139,7 @@ Partial Class DocumentViewer
         Me.GdViewer.ScrollLargeChange = CType(50, Short)
         Me.GdViewer.ScrollSmallChange = CType(1, Short)
         Me.GdViewer.SilentMode = True
-        Me.GdViewer.Size = New System.Drawing.Size(1079, 557)
+        Me.GdViewer.Size = New System.Drawing.Size(1012, 557)
         Me.GdViewer.TabIndex = 0
         Me.GdViewer.ViewRotation = System.Drawing.RotateFlipType.RotateNoneFlipNone
         Me.GdViewer.Zoom = 1.0R
@@ -364,7 +364,7 @@ Partial Class DocumentViewer
         Me.barDockControlTop.Dock = System.Windows.Forms.DockStyle.Top
         Me.barDockControlTop.Location = New System.Drawing.Point(0, 0)
         Me.barDockControlTop.Manager = Me.BarManager1
-        Me.barDockControlTop.Size = New System.Drawing.Size(1079, 33)
+        Me.barDockControlTop.Size = New System.Drawing.Size(1012, 33)
         '
         'barDockControlBottom
         '
@@ -372,7 +372,7 @@ Partial Class DocumentViewer
         Me.barDockControlBottom.Dock = System.Windows.Forms.DockStyle.Bottom
         Me.barDockControlBottom.Location = New System.Drawing.Point(0, 590)
         Me.barDockControlBottom.Manager = Me.BarManager1
-        Me.barDockControlBottom.Size = New System.Drawing.Size(1079, 0)
+        Me.barDockControlBottom.Size = New System.Drawing.Size(1012, 0)
         '
         'barDockControlLeft
         '
@@ -386,7 +386,7 @@ Partial Class DocumentViewer
         '
         Me.barDockControlRight.CausesValidation = False
         Me.barDockControlRight.Dock = System.Windows.Forms.DockStyle.Right
-        Me.barDockControlRight.Location = New System.Drawing.Point(1079, 33)
+        Me.barDockControlRight.Location = New System.Drawing.Point(1012, 33)
         Me.barDockControlRight.Manager = Me.BarManager1
         Me.barDockControlRight.Size = New System.Drawing.Size(0, 557)
         '
@@ -441,25 +441,30 @@ Partial Class DocumentViewer
         Me.SpreadsheetControl1.Text = "SpreadsheetControl1"
         Me.SpreadsheetControl1.Visible = False
         '
-        'LabelControl1
+        'lbFileNotLoaded
         '
-        Me.LabelControl1.Appearance.Options.UseTextOptions = True
-        Me.LabelControl1.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center
-        Me.LabelControl1.Appearance.TextOptions.VAlignment = DevExpress.Utils.VertAlignment.Center
-        Me.LabelControl1.AutoSizeMode = DevExpress.XtraEditors.LabelAutoSizeMode.None
-        Me.LabelControl1.Location = New System.Drawing.Point(340, 222)
-        Me.LabelControl1.Name = "LabelControl1"
-        Me.LabelControl1.Size = New System.Drawing.Size(409, 72)
-        Me.LabelControl1.TabIndex = 14
-        Me.LabelControl1.Tag = "Die Datei konnte nicht gefunden werden: {0}"
-        Me.LabelControl1.Text = "Die Datei konnte nicht gefunden werden: {0}"
-        Me.LabelControl1.Visible = False
+        Me.lbFileNotLoaded.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
+            Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
+        Me.lbFileNotLoaded.Appearance.Font = New System.Drawing.Font("Segoe UI", 9.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
+        Me.lbFileNotLoaded.Appearance.Options.UseFont = True
+        Me.lbFileNotLoaded.Appearance.Options.UseTextOptions = True
+        Me.lbFileNotLoaded.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center
+        Me.lbFileNotLoaded.Appearance.TextOptions.VAlignment = DevExpress.Utils.VertAlignment.Center
+        Me.lbFileNotLoaded.AutoEllipsis = True
+        Me.lbFileNotLoaded.AutoSizeMode = DevExpress.XtraEditors.LabelAutoSizeMode.None
+        Me.lbFileNotLoaded.Location = New System.Drawing.Point(3, 74)
+        Me.lbFileNotLoaded.Name = "lbFileNotLoaded"
+        Me.lbFileNotLoaded.Size = New System.Drawing.Size(1006, 72)
+        Me.lbFileNotLoaded.TabIndex = 14
+        Me.lbFileNotLoaded.Tag = ""
+        Me.lbFileNotLoaded.Text = "Die Datei konnte nicht geladen werden"
+        Me.lbFileNotLoaded.Visible = False
         '
         'DocumentViewer
         '
         Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
         Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
-        Me.Controls.Add(Me.LabelControl1)
+        Me.Controls.Add(Me.lbFileNotLoaded)
         Me.Controls.Add(Me.RichEditControl1)
         Me.Controls.Add(Me.SpreadsheetControl1)
         Me.Controls.Add(Me.GdViewer)
@@ -468,7 +473,7 @@ Partial Class DocumentViewer
         Me.Controls.Add(Me.barDockControlBottom)
         Me.Controls.Add(Me.barDockControlTop)
         Me.Name = "DocumentViewer"
-        Me.Size = New System.Drawing.Size(1079, 590)
+        Me.Size = New System.Drawing.Size(1012, 590)
         CType(Me.BarManager1, System.ComponentModel.ISupportInitialize).EndInit()
         CType(Me.RepositoryItemTextEdit2, System.ComponentModel.ISupportInitialize).EndInit()
         CType(Me.RepositoryItemTextEdit3, System.ComponentModel.ISupportInitialize).EndInit()
@@ -518,7 +523,7 @@ Partial Class DocumentViewer
     Friend WithEvents btnPrevHighlight As DevExpress.XtraBars.BarButtonItem
     Friend WithEvents btnNextHighlight As DevExpress.XtraBars.BarButtonItem
     Friend WithEvents RepositoryItemSearchControl1 As DevExpress.XtraEditors.Repository.RepositoryItemSearchControl
-    Friend WithEvents LabelControl1 As DevExpress.XtraEditors.LabelControl
+    Friend WithEvents lbFileNotLoaded As DevExpress.XtraEditors.LabelControl
     Friend WithEvents btnSearch As DevExpress.XtraBars.BarButtonItem
     Friend WithEvents btnSearch2 As DevExpress.XtraBars.BarButtonItem
 End Class
diff --git a/Controls.DocumentViewer/DocumentViewer.vb b/Controls.DocumentViewer/DocumentViewer.vb
index 8312e861..fed21387 100644
--- a/Controls.DocumentViewer/DocumentViewer.vb
+++ b/Controls.DocumentViewer/DocumentViewer.vb
@@ -470,6 +470,8 @@ Public Class DocumentViewer
             Dim oFileInfo = New FileInfo(FilePath)
             Dim oExtension As String = oFileInfo.Extension.ToUpper
 
+            lbFileNotLoaded.Visible = False
+
             RichEditControl1.Visible = False
             RichEditControl1.Dock = DockStyle.None
 
@@ -504,7 +506,11 @@ Public Class DocumentViewer
                     GdViewer.ForceTemporaryMode = True
                     GdViewer.AnnotationDropShadow = True
 
-                    GdViewer.DisplayFromFile(FilePath)
+                    If GdViewer.DisplayFromFile(FilePath) <> GdPictureStatus.OK Then
+                        Dim oFileName = IO.Path.GetFileName(FilePath)
+                        lbFileNotLoaded.Text = String.Format("Datei konnte nicht geladen werden:{0}{1}", vbCrLf, oFileName)
+                        lbFileNotLoaded.Visible = True
+                    End If
 
             End Select
 
@@ -686,7 +692,10 @@ Public Class DocumentViewer
     End Sub
 
     Private Sub btnSearch2_ItemClick(sender As Object, e As XtraBars.ItemClickEventArgs) Handles btnSearch2.ItemClick
-        _Search.SearchAll(txtSearch.EditValue.ToString)
+        If Not String.IsNullOrEmpty(txtSearch.EditValue) Then
+            _Search.SearchAll(txtSearch.EditValue?.ToString)
+
+        End If
     End Sub
 
     Private Sub btnPrevHighlight_ItemClick(sender As Object, e As XtraBars.ItemClickEventArgs) Handles btnPrevHighlight.ItemClick
diff --git a/GUIs.GlobalIndexer/packages.config b/GUIs.GlobalIndexer/packages.config
index 37cb9210..ce98cd21 100644
--- a/GUIs.GlobalIndexer/packages.config
+++ b/GUIs.GlobalIndexer/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="NLog" version="5.0.5" targetFramework="net461" />
+  <package id="NLog" version="5.0.5" targetFramework="net462" />
 </packages>
\ No newline at end of file
diff --git a/GUIs.Test.TestGUI/TestGUI.vbproj b/GUIs.Test.TestGUI/TestGUI.vbproj
index c56b33f1..75e31f7b 100644
--- a/GUIs.Test.TestGUI/TestGUI.vbproj
+++ b/GUIs.Test.TestGUI/TestGUI.vbproj
@@ -330,10 +330,38 @@
     <WCFMetadata Include="Connected Services\" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\Controls.ChatAddUser\ChatAddUser.vbproj">
+      <Project>{f0a807cc-be14-4b5b-9200-27c16156bd8a}</Project>
+      <Name>ChatAddUser</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Controls.ChatControl\ChatControl.vbproj">
+      <Project>{1f278760-4f6b-42e8-b82d-01d4c8618340}</Project>
+      <Name>ChatControl</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Controls.ChatNewConv\ChatNewConv.vbproj">
+      <Project>{86d27ffa-480f-481d-8d23-26deae92fe6c}</Project>
+      <Name>ChatNewConv</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Controls.DocumentViewer\DocumentViewer.vbproj">
+      <Project>{0958cddf-4a16-41f6-8837-8335f71d599c}</Project>
+      <Name>DocumentViewer</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Controls.LookupGrid\LookupControl.vbproj">
+      <Project>{3dcd6d1a-c830-4241-b7e4-27430e7ea483}</Project>
+      <Name>LookupControl</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\GUIs.Common\Common.vbproj">
+      <Project>{d20a6bf2-c7c6-4a7a-b34d-fa27d775a049}</Project>
+      <Name>Common</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Service.EDMIService\EDMIService.vbproj">
       <Project>{a8c3f298-76ab-4359-ab3c-986e313b4336}</Project>
       <Name>EDMIService</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Services.ZUGFeRDService\DDZUGFeRDService.vbproj">
+      <Project>{7deec36e-ea5f-4711-ad1e-fd8894f4ad77}</Project>
+      <Name>DDZUGFeRDService</Name>
+    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <None Include="Resources\alignhorizontalbottom.svg" />
diff --git a/GUIs.Test.TestGUI/frmDocView.vb b/GUIs.Test.TestGUI/frmDocView.vb
index 8c723ff1..b047fd16 100644
--- a/GUIs.Test.TestGUI/frmDocView.vb
+++ b/GUIs.Test.TestGUI/frmDocView.vb
@@ -4,9 +4,15 @@ Public Class frmDocView
     Private LogConfig As LogConfig
 
     Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
-        If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
-            DocumentViewer1.LoadFile(OpenFileDialog1.FileName)
+        If String.IsNullOrEmpty(TextBox1.Text) Then
+            If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
+                TextBox1.Text = OpenFileDialog1.FileName
+                DocumentViewer1.LoadFile(TextBox1.Text)
+            End If
+        Else
+            DocumentViewer1.LoadFile(TextBox1.Text)
         End If
+
     End Sub
 
     Private Sub frmDocView_Load(sender As Object, e As EventArgs) Handles Me.Load
diff --git a/GUIs.Test.TestGUI/frmObjectProperties.vb b/GUIs.Test.TestGUI/frmObjectProperties.vb
index 9ac74311..8dda75a1 100644
--- a/GUIs.Test.TestGUI/frmObjectProperties.vb
+++ b/GUIs.Test.TestGUI/frmObjectProperties.vb
@@ -1,5 +1,4 @@
 Imports DigitalData.GUIs.Common
-Imports DigitalData.GUIs.Common.Base
 Imports DigitalData.Modules.Database
 Imports DigitalData.Modules.Logging