Veeam Backup And Replication Overflow Error -

If you are running the free version of SQL Server Express, upgrade to PostgreSQL. SQL Express has a hard 10 GB database size limit and strict RAM limitations that trigger overflow conditions under heavy loads.

Found in Agent.Log : "Arithmetic operation resulted in an overflow (Int32.MaxValue exceeded during block count calculation)." veeam backup and replication overflow error

The backup job could not complete within its configured backup window due to various performance bottlenecks, source VM issues, or networking problems. The job's allowed backup window is too short for the actual data volume being processed. If you are running the free version of

Historically and currently, the is a primary culprit for arithmetic overflow errors. When data deduplication or optimization algorithms in the WAN accelerator behave unexpectedly—especially with high-throughput networks or compressed data—they can generate a number that causes an overflow in the reporting metric. 2. Upgrading/Reinstalling the OS The job's allowed backup window is too short