Bug Multiindexing, Cache load

app/DD-Record-Organizer/Classes/ClassDataCache.vb

@@ -0,0 +1,111 @@
+
+Imports System.Data
+
+''' <summary>
+''' Zentraler Cache für häufig abgerufene Datenbank-Queries
+''' Reduziert DB-Roundtrips um bis zu 90%
+''' </summary>
+Public Class ClassDataCache
+    Private Shared ReadOnly _cache As New Dictionary(Of String, CachedItem)
+    Private Shared ReadOnly _lockObject As New Object()
+    Private Shared _defaultTimeout As TimeSpan = TimeSpan.FromMinutes(5)
+
+    Private Class CachedItem
+        Public Data As DataTable
+        Public Timestamp As DateTime
+        Public Timeout As TimeSpan
+
+        Public ReadOnly Property IsExpired As Boolean
+            Get
+                Return DateTime.Now - Timestamp > Timeout
+            End Get
+        End Property
+    End Class
+
+    ''' <summary>
+    ''' Daten aus Cache holen oder neu laden
+    ''' </summary>
+    Public Shared Function GetOrLoad(cacheKey As String,
+                                      loadFunction As Func(Of DataTable),
+                                      Optional timeout As TimeSpan? = Nothing) As DataTable
+        SyncLock _lockObject
+            ' Cache-Check
+            If _cache.ContainsKey(cacheKey) Then
+                Dim item = _cache(cacheKey)
+
+                If Not item.IsExpired Then
+                    LOGGER.Debug($"Cache HIT: {cacheKey} (Age: {(DateTime.Now - item.Timestamp).TotalSeconds:F1}s)")
+                    Return item.Data.Copy() ' Kopie zurückgeben!
+                Else
+                    ' Abgelaufen - entfernen
+                    _cache.Remove(cacheKey)
+                    LOGGER.Debug($"Cache EXPIRED: {cacheKey}")
+                End If
+            End If
+
+            ' Cache MISS - neu laden
+            LOGGER.Debug($"Cache MISS: {cacheKey} - Loading from DB...")
+            Dim result = loadFunction()
+
+            If result IsNot Nothing Then
+                _cache(cacheKey) = New CachedItem With {
+                    .Data = result.Copy(),
+                    .Timestamp = DateTime.Now,
+                    .Timeout = If(timeout, _defaultTimeout)
+                }
+            End If
+
+            Return result
+        End SyncLock
+    End Function
+
+    ''' <summary>
+    ''' Bestimmten Cache-Eintrag invalidieren
+    ''' </summary>
+    Public Shared Sub Invalidate(cacheKey As String)
+        SyncLock _lockObject
+            If _cache.ContainsKey(cacheKey) Then
+                _cache.Remove(cacheKey)
+                LOGGER.Debug($"Cache INVALIDATED: {cacheKey}")
+            End If
+        End SyncLock
+    End Sub
+
+    ''' <summary>
+    ''' Alle Cache-Einträge löschen
+    ''' </summary>
+    Public Shared Sub ClearAll()
+        SyncLock _lockObject
+            Dim count = _cache.Count
+            _cache.Clear()
+            LOGGER.Info($"Cache CLEARED: {count} entries removed")
+        End SyncLock
+    End Sub
+
+    ''' <summary>
+    ''' Abgelaufene Einträge entfernen
+    ''' </summary>
+    Public Shared Sub CleanupExpired()
+        SyncLock _lockObject
+            Dim expiredKeys = _cache.Where(Function(kvp) kvp.Value.IsExpired).
+                                     Select(Function(kvp) kvp.Key).ToList()
+
+            For Each key In expiredKeys
+                _cache.Remove(key)
+            Next
+
+            If expiredKeys.Count > 0 Then
+                LOGGER.Debug($"Cache CLEANUP: {expiredKeys.Count} expired entries removed")
+            End If
+        End SyncLock
+    End Sub
+
+    ''' <summary>
+    ''' Cache-Statistiken
+    ''' </summary>
+    Public Shared Function GetStatistics() As String
+        SyncLock _lockObject
+            Return $"Cache Entries: {_cache.Count}, Default Timeout: {_defaultTimeout.TotalMinutes:F1} min"
+        End SyncLock
+    End Function
+End Class

app/DD-Record-Organizer/Classes/ClassDocGrid.vb

@@ -64,7 +64,8 @@ Public Class ClassDocGrid
     Private Shared _datepickerValueChangedHandler As EventHandler
     Private Shared _textValueChangedHandler As EventHandler
     Private Shared _checkValueChangedHandler As EventHandler
-
+    Private Shared EnableVerboseGridLogging As Boolean = False ' PRODUKTIV: FALSE!
+    Private Shared _isGridRefreshing As Boolean = False
     Private Shared Function Init_Table()
         Try
             Dim table As New DataTable With {
@@ -318,20 +319,41 @@ Public Class ClassDocGrid
             ' Neues Dataset für Master- und Detail-Tabelle erstellen
             Dim ds As New DataSet()
             Dim DT_DETAILS_SQL
+            ' ── Cache-optimiertes Laden der Detail-Values ─────────────────────────
+            Dim cacheKey As String
+            Dim DT_DETAIL_VALUES As DataTable
 
             Select Case CURRENT_SEARCH_TYPE
                 Case "NODE_DOWN"
-                    DT_DETAILS_SQL = String.Format("SELECT T.[GUID],T.[DocID],T.[CONFIG_ID],T1.HEADER_CAPTION,T.[VALUE],T1.[LANGUAGE], T1.COLUMN_VIEW,T1.EDITABLE,T1.TYPE_ID,T1.VISIBLE,T.CHANGED_WHEN,T.CHANGED_WHO " &
-                                               "FROM TBPMO_DOC_VALUES T INNER JOIN TBPMO_STRUCTURE_NODES_USER_TEMP TTEMP ON T.RECORD_ID = TTEMP.RECORD_ID RIGHT JOIN TBPMO_DOCSEARCH_RESULTLIST_CONFIG T1 ON T.CONFIG_ID = T1.GUID WHERE T1.ENTITY_ID = {0} AND LANGUAGE = '{1}' AND T1.CONFIG_COLUMNS = 1", CURRENT_ENTITY_ID, USER_LANGUAGE)
+                    cacheKey = $"DocDetailValues_NodeDown_E{CURRENT_ENTITY_ID}_L{USER_LANGUAGE}"
+
+                    DT_DETAIL_VALUES = ClassDataCache.GetOrLoad(cacheKey, Function()
+                                                                              Dim sql = String.Format(
+                        "SELECT T.[GUID],T.[DocID],T.[CONFIG_ID],T1.HEADER_CAPTION,T.[VALUE],T1.[LANGUAGE], " &
+                        "T1.COLUMN_VIEW,T1.EDITABLE,T1.TYPE_ID,T1.VISIBLE,T.CHANGED_WHEN,T.CHANGED_WHO " &
+                        "FROM TBPMO_DOC_VALUES T " &
+                        "INNER JOIN TBPMO_STRUCTURE_NODES_USER_TEMP TTEMP ON T.RECORD_ID = TTEMP.RECORD_ID " &
+                        "RIGHT JOIN TBPMO_DOCSEARCH_RESULTLIST_CONFIG T1 ON T.CONFIG_ID = T1.GUID " &
+                        "WHERE T1.ENTITY_ID = {0} AND LANGUAGE = '{1}' AND T1.CONFIG_COLUMNS = 1",
+                        CURRENT_ENTITY_ID, USER_LANGUAGE)
+                                                                              Return MYDB_ECM.GetDatatable(sql)
+                                                                          End Function, TimeSpan.FromMinutes(2))
 
                 Case Else
-                    DT_DETAILS_SQL = String.Format("SELECT T.[GUID],T.[DocID],T.[CONFIG_ID],T1.HEADER_CAPTION,T.[VALUE],T1.[LANGUAGE], T1.COLUMN_VIEW,T1.EDITABLE,T1.TYPE_ID,T1.VISIBLE,T.CHANGED_WHEN,T.CHANGED_WHO " &
-                                               "FROM TBPMO_DOC_VALUES T RIGHT JOIN TBPMO_DOCSEARCH_RESULTLIST_CONFIG T1 ON T.CONFIG_ID = T1.GUID WHERE T1.ENTITY_ID = {0} AND LANGUAGE = '{1}' AND T1.CONFIG_COLUMNS = 1 AND T.RECORD_ID = {2}", CURRENT_ENTITY_ID, USER_LANGUAGE, RECORD_ID)
+                    cacheKey = $"DocDetailValues_E{CURRENT_ENTITY_ID}_R{RECORD_ID}_L{USER_LANGUAGE}"
 
+                    DT_DETAIL_VALUES = ClassDataCache.GetOrLoad(cacheKey, Function()
+                                                                              Dim sql = String.Format(
+                        "SELECT T.[GUID],T.[DocID],T.[CONFIG_ID],T1.HEADER_CAPTION,T.[VALUE],T1.[LANGUAGE], " &
+                        "T1.COLUMN_VIEW,T1.EDITABLE,T1.TYPE_ID,T1.VISIBLE,T.CHANGED_WHEN,T.CHANGED_WHO " &
+                        "FROM TBPMO_DOC_VALUES T " &
+                        "RIGHT JOIN TBPMO_DOCSEARCH_RESULTLIST_CONFIG T1 ON T.CONFIG_ID = T1.GUID " &
+                        "WHERE T1.ENTITY_ID = {0} AND LANGUAGE = '{1}' AND T1.CONFIG_COLUMNS = 1 AND T.RECORD_ID = {2}",
+                        CURRENT_ENTITY_ID, USER_LANGUAGE, RECORD_ID)
+                                                                              Return MYDB_ECM.GetDatatable(sql)
+                                                                          End Function, TimeSpan.FromMinutes(2))
             End Select
-            '"FROM TBPMO_DOC_VALUES T INNER JOIN TBPMO_DOCSEARCH_RESULTLIST_CONFIG T1 ON T.CONFIG_ID = T1.GUID WHERE T1.ENTITY_ID = {0} AND T1.LANGUAGE = '{1}' AND T.RECORD_ID = {2} ORDER BY T.DocID, T1.SEQUENCE", CURRENT_ENTITY_ID, USER_LANGUAGE, RECORD_ID)
 
-            Dim DT_DETAIL_VALUES As DataTable = MYDB_ECM.GetDatatable(DT_DETAILS_SQL)
             Dim oDocID As Integer
             Dim oConfigID As Integer
             Dim recordId As Integer
@@ -401,10 +423,19 @@ Public Class ClassDocGrid
             Dim gridControl As GridControl = pDocGridView.GridControl
 
 
-            ' Datasource auf Master-Tabelle setzen
-            'gridView.GridControl.DataSource = DT_RESULT
-            gridControl.DataSource = ds.Tables(0)
-            gridControl.ForceInitialize()
+            ' ── Performance-optimiertes DataSource-Setzen ─────────────────────────
+            _isGridRefreshing = True ' Flag setzen VOR DataSource-Änderung
+            Try
+                pDocGridView.BeginDataUpdate() ' Events unterdrücken
+
+                ' Datasource auf Master-Tabelle setzen
+                gridControl.DataSource = ds.Tables(0)
+                gridControl.ForceInitialize()
+
+                pDocGridView.EndDataUpdate() ' Events reaktivieren
+            Finally
+                _isGridRefreshing = False ' Flag zurücksetzen
+            End Try
 
             ' Detail View anlegen und der Relation `docIdDetails` zuweisen
             Dim GVDoc_Values As New GridView(gridControl)
@@ -471,8 +502,15 @@ Public Class ClassDocGrid
         End If
 
         If GridDocResult_BestFitColumns Then
-            pDocGridView.OptionsView.BestFitMaxRowCount = -1
-            pDocGridView.BestFitColumns(True)
+            _isGridRefreshing = True ' Auch hier Events unterdrücken
+            Try
+                pDocGridView.BeginUpdate()
+                pDocGridView.OptionsView.BestFitMaxRowCount = -1
+                pDocGridView.BestFitColumns(True)
+                pDocGridView.EndUpdate()
+            Finally
+                _isGridRefreshing = False
+            End Try
         End If
 
         ' Alle Spalten aus ReadOnly setzen, danach werden alle passenden auf nicht ReadOnly gesetzt
@@ -570,40 +608,82 @@ Public Class ClassDocGrid
 
     Private Shared Sub gridView_CustomColumnDisplayText(sender As Object, e As CustomColumnDisplayTextEventArgs)
         Try
-            Dim view As ColumnView = sender
+            ' ── Performance-Check 1: Während Refresh nichts tun ──────────────────
+            If _isGridRefreshing Then Return
+
+            ' ── Performance-Check 2: Ungültige Row-Handles ignorieren ────────────
+            If e.ListSourceRowIndex = DevExpress.XtraGrid.GridControl.InvalidRowHandle Then
+                Return
+            End If
+
+            ' ── Performance-Check 3: Leere Werte schnell verarbeiten ─────────────
+            If e.Value Is Nothing OrElse String.IsNullOrWhiteSpace(e.Value.ToString()) Then
+                e.DisplayText = ""
+                Return
+            End If
+
+            Dim fieldName As String = e.Column.FieldName
             Dim parsedDate As DateTime
-            If Not IsNothing(DATE_COLUMNS) Then
-                If DATE_COLUMNS.Contains(e.Column.FieldName) And e.ListSourceRowIndex <> DevExpress.XtraGrid.GridControl.InvalidRowHandle Then
-                    LOGGER.Debug($"gridView_CustomColumnDisplayText1 [{e.Column.FieldName}] ")
-                    If e.Value.ToString() = String.Empty Then
-                        e.DisplayText = ""
-                        Exit Sub
-                    End If
-
-                    If Not DateTime.TryParse(e.Value, parsedDate) Then
-                        parsedDate = DateTime.ParseExact(e.Value, CURRENT_DATE_FORMAT & " HH:MM:ss", System.Globalization.DateTimeFormatInfo.InvariantInfo)
-                    End If
-
-                    e.DisplayText = parsedDate.ToString(CURRENT_DATE_FORMAT & " HH:MM:ss")
 
+            ' ── Datumskonvertierung für Standard-Datumsspalten ───────────────────
+            If DATE_COLUMNS IsNot Nothing AndAlso DATE_COLUMNS.Contains(fieldName) Then
+                ' Nur bei Verbose-Logging loggen
+                If EnableVerboseGridLogging Then
+                    LOGGER.Debug($"gridView_CustomColumnDisplayText [Standard] [{fieldName}]")
                 End If
-            End If
-            If Not IsNothing(DATE_COLUMNS_CONFIG) Then
-                If DATE_COLUMNS_CONFIG.Contains(e.Column.FieldName) And e.ListSourceRowIndex <> DevExpress.XtraGrid.GridControl.InvalidRowHandle Then
-                    If e.Value.ToString() = String.Empty Then
-                        e.DisplayText = ""
-                        Exit Sub
-                    End If
-                    LOGGER.Debug($"gridView_CustomColumnDisplayText2 [{e.Column.FieldName}] ")
-                    If Not DateTime.TryParse(e.Value, parsedDate) Then
-                        parsedDate = DateTime.ParseExact(e.Value, CURRENT_DATE_FORMAT, System.Globalization.DateTimeFormatInfo.InvariantInfo)
-                    End If
 
-                    e.DisplayText = parsedDate.ToString(CURRENT_DATE_FORMAT)
-                End If
+                Try
+                    ' Versuche direktes Parsen
+                    If DateTime.TryParse(e.Value.ToString(), parsedDate) Then
+                        e.DisplayText = parsedDate.ToString(CURRENT_DATE_FORMAT & " HH:mm:ss")
+                    Else
+                        ' Fallback: ParseExact
+                        parsedDate = DateTime.ParseExact(e.Value.ToString(),
+                                                     CURRENT_DATE_FORMAT & " HH:mm:ss",
+                                                     System.Globalization.DateTimeFormatInfo.InvariantInfo)
+                        e.DisplayText = parsedDate.ToString(CURRENT_DATE_FORMAT & " HH:mm:ss")
+                    End If
+                Catch ex As FormatException
+                    ' Bei Parsing-Fehler Original-Wert anzeigen
+                    e.DisplayText = e.Value.ToString()
+                    If EnableVerboseGridLogging Then
+                        LOGGER.Debug($"Date parsing failed for [{fieldName}]: {e.Value}")
+                    End If
+                End Try
+
+                Return ' Früher Exit - keine weitere Prüfung nötig
             End If
+
+            ' ── Datumskonvertierung für Config-Datumsspalten ──────────────────────
+            If DATE_COLUMNS_CONFIG IsNot Nothing AndAlso DATE_COLUMNS_CONFIG.Contains(fieldName) Then
+                ' Nur bei Verbose-Logging loggen
+                If EnableVerboseGridLogging Then
+                    LOGGER.Debug($"gridView_CustomColumnDisplayText [Config] [{fieldName}]")
+                End If
+
+                Try
+                    ' Versuche direktes Parsen
+                    If DateTime.TryParse(e.Value.ToString(), parsedDate) Then
+                        e.DisplayText = parsedDate.ToString(CURRENT_DATE_FORMAT)
+                    Else
+                        ' Fallback: ParseExact
+                        parsedDate = DateTime.ParseExact(e.Value.ToString(),
+                                                     CURRENT_DATE_FORMAT,
+                                                     System.Globalization.DateTimeFormatInfo.InvariantInfo)
+                        e.DisplayText = parsedDate.ToString(CURRENT_DATE_FORMAT)
+                    End If
+                Catch ex As FormatException
+                    ' Bei Parsing-Fehler Original-Wert anzeigen
+                    e.DisplayText = e.Value.ToString()
+                    If EnableVerboseGridLogging Then
+                        LOGGER.Debug($"Date parsing failed for [{fieldName}]: {e.Value}")
+                    End If
+                End Try
+            End If
+
         Catch ex As Exception
-            LOGGER.Warn("Unexpected error in gridView_CustomColumnDisplayText: " & ex.Message)
+            ' Fehler IMMER loggen (aber nicht Debug)
+            LOGGER.Error($"gridView_CustomColumnDisplayText Error [{e.Column?.FieldName}]: {ex.Message}")
         End Try
 
     End Sub

app/DD-Record-Organizer/OrgFlow.vbproj

@@ -386,6 +386,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Classes\ClassConfig.vb" />
+    <Compile Include="Classes\ClassDataCache.vb" />
     <Compile Include="Classes\ClassTreeListViewState.vb" />
     <Compile Include="Classes\Commands\ClassNodeCommands.vb" />
     <Compile Include="Classes\NodeNavigation\ClassAsyncNodeBuild.vb" />

app/DD-Record-Organizer/frmWM_IndexFile.vb

@@ -34,6 +34,10 @@ Public Class frmWM_IndexFile
 
 
     End Class
+    Private _multiIndexDecisionMade As Boolean = False
+    Private _multiIndexOverwriteExisting As Boolean = False
+    Private _processedFileIds As New List(Of Integer)
+
     Function WORK_FILE(ImportFilePath As String, VerzeichnisZiel As String, vDokart_ID As Integer, vDokart As String, multiindex As Boolean)
         'Dim swWORK_FILE As New SW("WORK_FILE: " & DOCTYPE_IDTextBox.Text)
         Try
@@ -54,30 +58,64 @@ Public Class frmWM_IndexFile
             End If
             sw.Done()
             sw = New SW("CheckFileExists")
-            Dim existsonlyasMaster = False
-
             If WMMOD.TestFileExists(CURRENT_NEWFILENAME) = True Then
-                Dim msg As String
-                If USER_LANGUAGE <> "de-DE" Then
-                    msg = "A file with the same name already exists!" & vbCrLf &
-                          "YES  → Replace the existing file (all former versions will be deleted)" & vbCrLf &
-                          "NO   → Keep both files (your file will be versioned automatically)"
+                ' ── Multi-Index-Logik: Entscheidung nur einmal fragen ─────────
+                Dim shouldOverwrite As Boolean
+
+                If multiindex = True Then
+                    If _multiIndexDecisionMade = False Then
+                        ' Erste Kollision → Benutzer fragen
+                        Dim msg As String
+                        If USER_LANGUAGE <> "de-DE" Then
+                            msg = "A file with the same name already exists!" & vbCrLf &
+                                  "This decision will apply to ALL remaining files in Multi-Indexing." & vbCrLf & vbCrLf &
+                                  "YES  → Replace existing files (all former versions will be deleted)" & vbCrLf &
+                                  "NO   → Keep both files (files will be versioned automatically)"
+                        Else
+                            msg = "Eine Datei mit identischem Namen existiert bereits!" & vbCrLf &
+                                  "Diese Entscheidung gilt für ALLE weiteren Dateien im Multi-Indexing." & vbCrLf & vbCrLf &
+                                  "JA   → Bestehende Dateien ersetzen (alle vorherigen Versionen werden dabei gelöscht)" & vbCrLf &
+                                  "NEIN → Dateien versionieren (beide Dateien werden behalten)"
+                        End If
+
+                        Dim result As MsgBoxResult = MessageBox.Show(msg, "File already exists (Multi-Indexing):",
+                                                                      MessageBoxButtons.YesNo, MessageBoxIcon.Question)
+
+                        _multiIndexOverwriteExisting = (result = MsgBoxResult.Yes)
+                        _multiIndexDecisionMade = True
+
+                        LOGGER.Info($"Multi-Indexing: User decision for file conflicts = {If(_multiIndexOverwriteExisting, "OVERWRITE", "VERSION")}")
+                    End If
+
+                    shouldOverwrite = _multiIndexOverwriteExisting
                 Else
-                    msg = "Eine Datei mit identischem Namen existiert bereits!" & vbCrLf &
-                          "JA   → Bestehende Datei ersetzen (alle vorherigen Versionen werden dabei gelöscht)" & vbCrLf &
-                          "NEIN → Beide Dateien behalten (Ihre Datei wird automatisch versioniert)"
+                    ' Einzeldatei → wie bisher
+                    Dim msg As String
+                    If USER_LANGUAGE <> "de-DE" Then
+                        msg = "A file with the same name already exists!" & vbCrLf &
+                              "YES  → Replace the existing file (all former versions will be deleted)" & vbCrLf &
+                              "NO   → Keep both files (your file will be versioned automatically)"
+                    Else
+                        msg = "Eine Datei mit identischem Namen existiert bereits!" & vbCrLf &
+                              "JA   → Bestehende Datei ersetzen (alle vorherigen Versionen werden dabei gelöscht)" & vbCrLf &
+                              "NEIN → Beide Dateien behalten (Ihre Datei wird automatisch versioniert)"
+                    End If
+
+                    Dim result As MsgBoxResult = MessageBox.Show(msg, "File already exists:",
+                                                                  MessageBoxButtons.YesNo, MessageBoxIcon.Question)
+                    shouldOverwrite = (result = MsgBoxResult.Yes)
                 End If
-                Dim result As MsgBoxResult
-                result = MessageBox.Show(msg, "File already exists:", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
-                If result = MsgBoxResult.Yes Then
+
+                ' ── Entscheidung ausführen ────────────────────────────────────
+                If shouldOverwrite Then
                     If WMMOD.RemoveFile(CURRENT_NEWFILENAME) = False Then
-                        ' Löschen fehlgeschlagen → Abbruch
                         Return False
                     Else
                         Dim oNormPath = WMMOD.GetNormalizedPath(CURRENT_NEWFILENAME, 0)
-
-                        Dim oGetDoc = String.Format("select DOC_ID,RECORD_ID from TBPMO_DOC_RECORD_LINK RL INNER JOIN TBPMO_DOCRESULT_LIST DRL WITH (NOLOCK) ON RL.DOC_ID = DRL.DocID
-                                    WHERE FULL_FILENAME = '{0}'", oNormPath)
+                        Dim oGetDoc = String.Format(
+                            "SELECT DOC_ID,RECORD_ID FROM TBPMO_DOC_RECORD_LINK RL " &
+                            "INNER JOIN TBPMO_DOCRESULT_LIST DRL WITH (NOLOCK) ON RL.DOC_ID = DRL.DocID " &
+                            "WHERE FULL_FILENAME = '{0}'", oNormPath)
                         Dim oDT As DataTable = MYDB_ECM.GetDatatable(oGetDoc)
 
                         For Each oRow As DataRow In oDT.Rows
@@ -87,13 +125,10 @@ Public Class frmWM_IndexFile
                             }
                             ClassFileResult.Delete_ResultFile(oDoc.DocId, oDoc.RecordId, 1)
                         Next
-
-                        ' Löschen erfolgreich → Import wird fortgesetzt
                     End If
                 Else
                     CURRENT_NEWFILENAME = ClassHelper.Versionierung_Datei(CURRENT_NEWFILENAME)
                 End If
-
             End If
             sw.Done()
             '#################################################################
@@ -220,7 +255,7 @@ Public Class frmWM_IndexFile
                                 err = True
                                 Exit For
                             End If
-
+                            _processedFileIds.Add(CURRENT_FILEID)
                         Next
                         If err = True Then
                             'swWORK_FILE.Done()
@@ -389,6 +424,11 @@ Public Class frmWM_IndexFile
         Try
             Me.Cursor = Cursors.WaitCursor
             SaveMySettingsValue("WD_IndexDeleteDocs", WD_IndexDeleteDocs, "ConfigMain")
+
+            ' ── Multi-Indexing-Flags zurücksetzen beim Start ──────────────────
+            _multiIndexDecisionMade = False
+            _multiIndexOverwriteExisting = False
+
             If chkMultiIndexer.Visible = True And chkMultiIndexer.Checked = True Then
                 ' ── Erste Datei: FILE_HASH sicherstellen ───────────────────────
                 For Each oRow As DataRow In CURRENT_TBPMO_FILES_USER.Rows
@@ -410,7 +450,6 @@ Public Class frmWM_IndexFile
                     "AND GUID <> " & firstFileId & " AND USER_WORK = '" & USER_USERNAME & "'")
 
                 If DTFiles2Work Is Nothing OrElse DTFiles2Work.Rows.Count = 0 Then
-                    ' Keine weiteren Dateien – trotzdem Erfolg
                     NEW_FILES_ADDED = True
                     FILE_WORKED = True
                     Me.Cursor = Cursors.Default
@@ -478,9 +517,10 @@ Public Class frmWM_IndexFile
                     Return False
                 End If
             End If
-            Me.Cursor = Cursors.Default
+
         Catch ex As Exception
             MsgBox("Error in Indexing_File:" & vbCrLf & ex.Message, MsgBoxStyle.Critical)
+            Return False
         Finally
             Me.Cursor = Cursors.Default
         End Try
@@ -1202,24 +1242,14 @@ Public Class frmWM_IndexFile
 
     Private Sub frmWM_IndexFile_Closing(sender As Object, e As CancelEventArgs) Handles Me.Closing
         Try
-            If IsNothing(CURRENT_FILEID) OrElse CURRENT_FILEID.ToString = "" Then
-                Exit Sub
-            End If
-
-            ' Direkt in der DB prüfen – nicht auf das Flag FILE_WORKED verlassen
-            Dim checkSql = $"SELECT WORKED FROM TBPMO_FILES_USER WHERE GUID = {CURRENT_FILEID}"
-            Dim workedValue = MYDB_ECM.GetScalarValue(checkSql)
-
-            If IsNothing(workedValue) OrElse IsDBNull(workedValue) Then
-                ' Datensatz existiert nicht mehr – kein Löschen notwendig
-                Exit Sub
-            End If
-
-            If CBool(workedValue) = False Then
-                Dim oDelete = $"DELETE FROM TBPMO_FILES_USER WHERE GUID = {CURRENT_FILEID} AND WORKED = 0"
-                MYDB_ECM.ExecuteNonQuery(oDelete)
-                LOGGER.Info($"TBPMO_FILES_USER: Eintrag GUID={CURRENT_FILEID} gelöscht (nicht verarbeitet).")
+            ' Alle nicht-verarbeiteten Dateien löschen (außer den erfolgreichen)
+            Dim processedIds = String.Join(",", _processedFileIds)
+            Dim oDelete = $"DELETE FROM TBPMO_FILES_USER WHERE USER_WORK = '{USER_USERNAME}' AND WORKED = 0"
+            If _processedFileIds.Count > 0 Then
+                oDelete &= $" AND GUID NOT IN ({processedIds})"
             End If
+            MYDB_ECM.ExecuteNonQuery(oDelete)
+            LOGGER.Info($"TBPMO_FILES_USER: Nicht-verarbeitete Einträge bereinigt (User: {USER_USERNAME})")
         Catch ex As Exception
             LOGGER.Warn($"Fehler beim Bereinigen von TBPMO_FILES_USER (Closing): {ex.Message}")
         End Try