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  • copy-paste problem "Invalid MS-DOS function"

    Hi
    I am using a new Acer Veriton M460, 32 bit , running Vista Business SP1.
    When trying to copy files from any mapped network drive:
    If the file is larger than 256K i get message "Invalid MS-DOS function"
    and in some cases " Could not find this item this is no longer located in "xxx". Verify the items location and try again ".
    The mapped drives (tried several) are healthy.
    Does anyone know how to solve this?
    Thank you

  • #2
    Re: copy-paste problem "Invalid MS-DOS function"

    A quick revealed this on http://dearprakash.com/
    I really banged my head for a while and later found that Vista has some real issues copying files larger than 256kB. Can you believe??


    So the fix is :
    • Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Win dows\System
    • Create a DWORD entry and name it CopyFileBufferedSynchronousIo
    • Set the value to 1
    • Either restart or flush Registry keys by Start->ShutDown but when the dialog to shut down comes, press Cancel.
    Voila.. You can now copy files larger than 256kB in Vista..
    If the information you receive helps please let us know and leave reputation points where appropriate.

    The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do. - Ted Nelson

    Comment


    • #3
      Re: copy-paste problem "Invalid MS-DOS function"

      Hmm
      http://support.microsoft.com/kb/941673
      I think there has to be more to it than that.

      This too
      http://support.microsoft.com/kb/947773

      Where are you copying to and how are you doing it, there may be more to find!
      cheers
      Andy

      Please read this before you post:


      Quis custodiet ipsos custodes?

      Comment


      • #4
        Re: copy-paste problem "Invalid MS-DOS function"

        I am copying from the mapped drive to itself or to my local drive.
        using drag-drop or right click copy paste.
        Save-as doesn't work if it is larger than 256K - everything that creates a new file.
        I am able to open edit and resave a 3M file.
        On my local drive drag and drop are working ok at any size.

        Comment


        • #5
          Re: copy-paste problem "Invalid MS-DOS function"

          From where though? What is the mapped drive on?
          I'm not saying g00ner is wrong, just interested in the background.

          Are the laptop and the remote machine up to date with patches and NIC drivers?
          cheers
          Andy

          Please read this before you post:


          Quis custodiet ipsos custodes?

          Comment


          • #6
            Re: copy-paste problem "Invalid MS-DOS function"

            My computer is a new desktop, all updates are installed.
            The drives that i mapped are shared drives of other desktops in our lab (Vista, XP or Linux). All updated with the suggested windows updates (i don't know what NIC drivers are...). All mapped drivers have the same problem.
            I apologize that my answers are low level. i am not an expert at all...

            Comment


            • #7
              Re: copy-paste problem "Invalid MS-DOS function"

              I forgot to say that I tried g00ner's advise but the problem stays the same.

              Comment


              • #8
                Re: copy-paste problem "Invalid MS-DOS function"

                NIC drivers are the network card drivers available from the machines manufacturer.

                It may be worth a scan with a product like wireshark but that isn't easy to explain.
                cheers
                Andy

                Please read this before you post:


                Quis custodiet ipsos custodes?

                Comment

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