Getting error “specified network name is no longer available” as soon as I try to open file programatically (VBA)

cbrf23

Board Regular
Joined
Jun 20, 2011
Messages
241
In VBA for excel I'm using the `FileSystemObject` to loop through the files in a folder, then when I find an excel file I'm trying to open it and update any hyperlinks in the file.

Whenever I try to open a file in excel, I receive the error message `Run-time error '2147024832 (80070040)': Automation error The specified network name is no longer available.` The attempt to open the file fails, and if I step back through the code after this event, I no longer seem to be able to "see" the files in the folder object.

For example, if there are 6 files in a folder, and the last one is an excel file, the `ModifyFiles` function will loop through the first 5 files, see that they aren't excel files, and move to the next. On the last it will properly recognize the excel file and call the `IsWorkBookOpen` function,if it is not open, it succeeds in checking and then it proceeds to call the `UpdateLinks` procedure. When it hits the line to open the file it takes a second to execute and I see a flash of a workbook being added to the list of projects in the VBA project window - but it immediately closes (is removed from the projects tree) and the code actually steps back to the previous line (which is in the calling procedure). If I continue to step through, when it gets to that line again and tries to execute it that's when I get the network name is no longer available error message. From there, if I step back through the code and try to access and files/folders using the `FileSystemObject` I get one of two error messages `the network name is no longer available` or `permission denied`.

It's as if trying to open the file is breaking my connection to the server.
Any suggestions?

My code (server names and shares have been changed, but I checked them for accuracy and they are good):
Code:
   Option Explicit
Dim strLISTMOD()            As String
Dim strLISTINUSE()           As String

Sub Main()
    Dim blnE    As Boolean
    Dim blnA    As Boolean
    Dim blnS    As Boolean
    
        With Application
            blnE = .EnableEvents
            blnA = .DisplayAlerts
            blnS = .ScreenUpdating
            '.EnableEvents = False
            '.DisplayAlerts = False
            '.ScreenUpdating = False
        End With
    
    ReDim strLISTMOD(0 To 0)
    ReDim strLISTINUSE(0 To 0)
    FileDigger "\\lokts64\engshare\"
    
        With Application
            .EnableEvents = blnE
            .DisplayAlerts = blnA
            .ScreenUpdating = blnS
        End With
End Sub

Private Function IsWorkBookOpen(ByRef strFILENAME As String)
    Dim lngX                As Long
    Dim lngErr              As Long

    On Error Resume Next
    lngX = FreeFile()
    Open strFILENAME For Input Lock Read As #lngX
    Close lngX
    lngErr = Err
    On Error GoTo 0

        Select Case lngErr
            Case 0:    IsWorkBookOpen = False
            Case 70:   IsWorkBookOpen = True
            Case Else: Error lngErr
        End Select
End Function

Private Function FileDigger(strDIRECTORY As String) As String

    Dim oFsoX               As Scripting.FileSystemObject
    Dim foldX               As Scripting.Folder
    Dim foldY               As Scripting.Folder
    Dim lngErr              As Long
    
    Set oFsoX = New Scripting.FileSystemObject
    
    On Error Resume Next
    Set foldX = oFsoX.GetFolder(strDIRECTORY)
    lngErr = Err
    On Error GoTo 0
    
        If lngErr > 0 Then
            Err.Raise lngErr
            lngErr = 0
        End If
    
        If Not foldX Is Nothing Then
            ModifyFiles foldX
                For Each foldY In foldX.SubFolders
                    FileDigger = FileDigger(foldY.Path)
                Next
        End If

End Function

Private Sub ModifyFiles(ByRef foldDIR As Scripting.Folder)
    Dim fileX               As Scripting.File
    Dim lngX                As Long
    
        For Each fileX In foldDIR.Files
            If fileX.Name Like "*.xls*" Then
                    If Not IsWorkBookOpen(fileX.Path) Then
                        AddToList fileX.Path, True
                    Else
                        AddToList fileX.Path, False
                    End If
            End If
        Next
        
        For lngX = 0 To UBound(strLISTMOD)
            If Len(strLISTMOD(lngX)) > 0 Then UpdateLinks strLISTMOD(lngX)
        Next
End Sub

Private Sub UpdateLinks(strPATH As String)
    Dim lnkX    As Excel.Hyperlink
    Dim wshX    As Excel.Worksheet
    Dim wbkX    As Excel.Workbook

    Set wbkX = Excel.Application.Workbooks.Open(strPATH, 3, False, , , , True, , , , False, , False, True, xlNormalLoad)
    For Each wshX In wbkX.Worksheets
       For Each lnkX In wshX.Hyperlinks
            lnkX.Address = Replace(lnkX.Address, "\\lokad\eng\share\", "\\lokts\engshare\")
        Next lnkX
    Next
    wbkX.Close True
    
End Sub

Private Sub AddToList(ByRef strFILENAME As String, ByRef blnMODLIST As Boolean)
    Dim strLIST()   As String
    
        If blnMODLIST Then strLIST = strLISTMOD Else strLIST = strLISTINUSE
        
    If Len(strLIST(0)) > 0 Then
        ReDim Preserve strLIST(0 To UBound(strLIST) + 1)
        strLIST(UBound(strLIST)) = strFILENAME
    Else
        strLIST(0) = strFILENAME
    End If
    
        If blnMODLIST Then strLISTMOD = strLIST Else strLISTINUSE = strLIST
End Sub
 

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Well, I think I have this solved. I'm not 100% sure on the root cause of the problem - which if anyone knows and cares to answer I'm extremely curious to learn - but I think the problem was that I was trying to access the file before I was done accessing the folder with the `FileSystemObject` object. I don't know if the FSO object reserves each folder or what, but I found if I destroy the FSO object then I could access the files. What I ended up doing was modifying the `FileDigger` function so that I am constructing the entire list of all the files (root directory and all subfolders) to modify BEFORE I tried to open any file in excel. I used a Boolean flag to identify the root call of the recursive `FileDigger` procedure, then I just destroy the FSO object before calling the `ModifyFiles` procedure. This seems to work in testing. I'll have to wait until the workday is over to run it on the entire network share as I don't want to create that much traffic while people are accessing files on that share.
 
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