Veeam Backup And Replication Overflow Error Official

"The datediff function resulted in an overflow." This happens when the retention policy tries to calculate the gap between two dates that are too far apart (e.g., a "last backup" date showing as a negative number or centuries in the past).

: These errors are usually safe to ignore as they do not typically impact the actual backup data or job performance; they are simply a reporting error in the UI. veeam backup and replication overflow error

When using Veeam Agent for Windows (managed by the backup server), a race condition in the VSS (Volume Shadow Copy) writer might return an abnormally large timestamp or byte count, leading to an overflow in the backup job’s processing thread. "The datediff function resulted in an overflow

: Commonly triggered by WAN Acceleration reporting abnormal transfer rates (e.g., millions of GBps) that exceed SQL data type limits. Solution : : Commonly triggered by WAN Acceleration reporting abnormal

Before diving into fixes, you need to recognize when you’re dealing with this specific issue. Common symptoms include: