| error 0x4001fb: Failed to open the backup archive by the ID.
| line: 0xa1d3981537c68833
| file: e:\235\enterprise\backup\impl\location_impl.cpp:821
| function: Backup::Impl::OpenArchiveById
| id: AcronisBackup.TIB
| $module: disk_bundle_vsa64_10330
|
| error 0x400355: Failed to open archive 'AcronisBackup.TIB'.
| line: 0x6a1198d1b8be2c36
| file: e:\235\enterprise\backup\impl\archive_data_creator.cpp:242
| function: `anonymous-namespace'::OpenArchive
| $module: disk_bundle_vsa64_10330
|
| error 0x400001: The archive is invalid or its type is unsupported.
| line: 0x98130db273d2482
| file: e:\235\enterprise\backup\archivers\is\archive.cpp:153
| function: Backup::ISArchive::Open
| $module: disk_bundle_vsa64_10330

The issue can be caused by a lost or corrupted .xml metadata file. Check if meta file (a xml file) is present in the backup location. If there are no such files or you suspect that they can be damaged, recreate the file.

To get a new metadata file for archive, use one of the following workarounds:

1. Refresh the affected vault: open Cyber Protection console, navigate to Backups - select affected storage - select affected backup - click on Show backups and then on Refresh icon.
2. Using Acronis Command Line Utility (installed by default with Agent for Windows, Agent for Linux, or Agent for Mac), run a command to list information about archives in the backup location. Running list backups command will automatically recreate metadata file:
   • Launch Command Prompt 
   • Issue the following command:

     acrocmd list backups --loc=<path_to_backup_location> --credentials=<user>,<pass> --arc=my_archive 

   • Credentials are required to access the network location. If backups are stored locally, skip this parameter
   • Examples:
   • acrocmd list backups --loc=E:\backups\  --arc=my_archive
   • acrocmd list backups --loc=\\bkpsrv\backups --credentials=netuser,pass --arc=my_archive

If you deleted the archive that is mentioned in the error message, follow the steps below: 

1. Find the appropriate .xml file in the backup storage location, and then save a copy of this file to some other location. 
2. In the original folder, open the .xml file in a text editor. Find the entry about deleted backup archive, e.g. 'AcronisBackup-Vol_2018_11_04_23_06_20_926D2.TIB'. Remove this part from the .xml: it starts with <metainfo id= and ends with </metainfo>. Save changes to the file.

   

3. Refresh the affected vault: open Cyber Protection console, navigate to Backups - select affected storage - select affected backup - click on Show backups and then on Refresh.

Meta information of the backup archive is stored in the first archive's slice. Check if the first slice is available on storage.

E.g. a complete set of archive volumes looks like this

[Machine Name]-[Plan ID]-[Unique ID]A.tibx

[Machine Name]-[Plan ID]-[Unique ID]A-0001.tibx

[Machine Name]-[Plan ID]-[Unique ID]A-0002.tibx

[Machine Name]-[Plan ID]-[Unique ID]A-0003.tibx ...

If the file [Machine Name]-[Plan ID]-[Unique ID]A.tibx is not present in backup location, and you deleted or moved it, restore it back to the backup location.

If restore is not possible, re-create the first slice manually:

(!) This workaround only works for non-encrypted archives.

1. Create a new empty .txt file in the backup location
2. Change the name of this file to the name of the missing initial backup volume, e.g. [Machine Name]-[Plan ID]-[Unique ID]A.tibx

Before

After

1. Validate the affected backup archive using Acronis command line utility and collect the log of the validation operation using --log parameter

• Acronis Cyber Backup 12.5: on a machine where Agent is installed, launch Command Prompt (Start -> Run -> cmd) and run the command for validation:
  acrocmd validate archive --loc=<path to backup> --arc=<archive name> --log=<full path>
  where
  <path to backup> is the folder where backup is located
  <archive name> is the name of the archive that you want to verify
  <full path> is the location where logs should be placed
  e.g. acrocmd validate archive --loc=E:\backups\ --arc=my_archive.tib --log=E:\logs

  For more information and other parameters see product documentation  

• Acronis Cyber Protect Cloud: see this article for instructions

2. Сollect system information from the agent machine.
Acronis Cyber Backup 12.5: see this article
Acronis Cyber Protect Cloud: see this article

3. If backup destination is Acronis Cloud Storage, also collect Acronis cloud certificate