Do not use special symbols in archive names, except pre-set templates in the product.
This article applies to:
- Acronis Backup & Recovery 11
- You create an archive with special symbols in the name, e.g. system[machine1];
- Backup operation completes successfully;
- Validation of this archive fails with the following error message:
Either the backup file is corrupt or the file is not an Acronis backup
Issue in the product. Archive is not correctly processed if archive name contains % or .
Rename the archive so that its name does not contain symbols  and %.
(!) Standard name variables like [Plan Name] and [Machine Name] do not cause this issue.
Issue has been fixed, update to the latest build. Special symbols are not allowed in the archive name except for pre-set templates.