I used this loop to PackNGo all models and the associated files (dwg) in an assembly file and it works ok

One problem: each time I run this code,   I missed (return empty) at least 1 to few revisions extracted from the line   swCustPropMgr.Get4 "Revision", True, Empty, strValOut

For i = 0 To (PGDocCount - 1)
        Set swCompModel = swApp.GetOpenDocumentByName(pgFileNames(i))
        If Not swCompModel Is Nothing Then
            Set swCustPropMgr = swCompModel.Extension.CustomPropertyManager(Empty)
            swCustPropMgr.Get4 "Revision", True, Empty, strValOut                  'Get the custom property value of Revision
        Else    'if virtual component
            strValOut = Empty
        End If
        ' Determine type of SolidWorks file based on file extension
        myFileName = GetFilenameFromPath(pgFileNames(i))              'Strip the path
        If InStr(LCase(myFileName), "sldprt") > 0 Then                  '
            myFileName = Left(myFileName, InStrRev(myFileName, ".") - 1) & "_" & Left(strValOut, 1) & ".sldprt"
        ElseIf InStr(LCase(myFileName), "sldasm") > 0 Then
            myFileName = Left(myFileName, InStrRev(myFileName, ".") - 1) & "_" & Left(strValOut, 1) & ".sldasm"
        ElseIf InStr(LCase(myFileName), "slddrw") > 0 Then
            myFileName = Left(myFileName, InStrRev(myFileName, ".") - 1) & "_" & Left(strValOut, 1) & ".slddrw"
        Else
            ' Only packing up SolidWorks files
            Exit Sub
        End If
        pgSetFileNames(i) = myPath & myFileName
        Debug.Print i & ". " & pgSetFileNames(i)
    Next i