1. Kotlicki's Avatar
    Hi,

    I'm trying to roll back my Lumia 1520 DP via Nokia Software Recovery Tool.

    The tool fails downloading the firmware file (.ffu) due to checksum error. It will retry and get stuck again at 100%.

    The log looks like this:

    2014-07-25 15:34:12Z | 3228 (NokiaSoftwareRecoveryTool) | 0x00000015 | NokiaSoftwareRecoveryTool.Connectivity.dll | NokiaSoftwareRecoveryTool.Connectivity.Mira.ParallelDownloader.DownloadManager | Error | The downloaded file C:\ProgramData\Nokia\Packages\Products\RM-937\RM937_1028.3562.1402.0001_RETAIL_eu_euro1_231_01_374945_prd_signed.ffu was deleted due to incorrect checksum. Download package operation retry without parallel downloading. |
    2014-07-25 15:34:12Z | 3228 (NokiaSoftwareRecoveryTool) | 0x00000015 | NokiaSoftwareRecoveryTool.Settings.dll | NokiaSoftwareRecoveryTool.Settings.Info.AppInfo | Information | getting registry value: Mode = |
    2014-07-25 15:34:13Z | 3228 (NokiaSoftwareRecoveryTool) | 0x00000003 | NokiaSoftwareRecoveryTool.Connectivity.dll | NokiaSoftwareRecoveryTool.Connectivity.Castor.FiReReport.Sender.FiReReportSender | Information | Fire report was sent successfully. |
    2014-07-25 15:54:31Z | 3228 (NokiaSoftwareRecoveryTool) | 0x00000034 | NokiaSoftwareRecoveryTool.Logics.dll | NokiaSoftwareRecoveryTool.Logics.Firmware.FirmwareDownloadLogic | Information | Downloading file: C:\ProgramData\Nokia\Packages\Products\RM-937\RM937_1028.3562.1402.0001_RETAIL_eu_euro1_231_01_374945_prd_signed.ffu completed |
    2014-07-25 15:54:36Z | 3228 (NokiaSoftwareRecoveryTool) | 0x00000034 | NokiaSoftwareRecoveryTool.Connectivity.dll | NokiaSoftwareRecoveryTool.Connectivity.Mira.ParallelDownloader.DownloadManager | Error | The downloaded file C:\ProgramData\Nokia\Packages\Products\RM-937\RM937_1028.3562.1402.0001_RETAIL_eu_euro1_231_01_374945_prd_signed.ffu was deleted due to incorrect checksum. Download package operation will be cancelled. |
    2014-07-25 15:54:36Z | 3228 (NokiaSoftwareRecoveryTool) | 0x00000034 | NokiaSoftwareRecoveryTool.Logics.dll | NokiaSoftwareRecoveryTool.Logics.Firmware.FirmwareDownloadLogic | Information | Download Completed |
    2014-07-25 15:54:36Z | 3228 (NokiaSoftwareRecoveryTool) | 0x00000034 | NokiaSoftwareRecoveryTool.Connectivity.dll | NokiaSoftwareRecoveryTool.Connectivity.Mira.ParallelDownloader.WebFileWrapper | Error | Downloading C:\ProgramData\Nokia\Packages\Products\RM-937\RM937_1028.3562.1402.0001_RETAIL_eu_euro1_231_01_374945_prd_signed.ffu Failed. Object reference not set to an instance of an object. |

    I have also tried using NSU with other RM-937 product codes and they all fail...

    Any idea what could be the issue?

    Thanks!
    07-25-2014 10:40 AM
  2. JasonKruys's Avatar
    Turn off your anti virus/ firewall.
    Sent from my Lumia 1520 using Tapatalk (with free typos)
    07-25-2014 11:46 AM
  3. Kotlicki's Avatar
    I'm on Win 8.1 with no 3rd party antivirus or firewall.

    Disabled both Windows Firewall and Windows Defender and still getting the same checksum problem.
    Tried a 2nd Win 8.1 computer - same issue.

    Any other thoughts?
    07-25-2014 03:12 PM

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