The MassTransit Engine may inadvertently shut down, and will not properly restart. Within the Application Log of the Windows Event Viewer, the following error message may be displayed:

SA_Exception[xxxx]: DB_Files_Edit: Incorrect key file for table 'tablename'; try to repair it.
Commonly, tablename may be referenced as 'dfiles'

This article describes how to change the delay time and key for starting Acronis Startup Recovery Manager.

This article describes ugrade procedure from Acronis True Image OEM versions.

Create special registry keys to fix this issue


  1. After you install Acronis Cyber Backup 12.5 on the machine, certain USB drives/keys are not instantly detected. It takes 2-5 minutes for the drive to acquire a letter and be accessible in Windows Explorer.
  2. If you stop Acronis Managed Machine service, the same USB drives are detected instantly.


Hardware incompatibility: some specific devices incorrectly process standard commands issued by Acronis product components.


Activation makes sure you are using Acronis Cyber Backup in the compliance with Acronis Licensing Policy and Acronis end user license agreement (EULA) [pdf]. In most cases, one purchased Acronis Cyber Backup license key allows protection of one physical machine.



  1. コンピュータに Acronis Cyber Backup 12.5 をインストールした後、特定の USBドライブ、またはキーが瞬時に検出されません。このドライブが文字を取得して、Windows エクスプローラでアクセス可能になるまでは、2~5分ほど時間がかかります。
  2. Acronis Managed Machine サービスを停止すると、同じUSBドライブが瞬時に検出されます。





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Acronis True Image 2020 Editions

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Acronis True Image 2020 のエディション