Erro backup RMAN

[Victor ArmbrustMestre]

[b]Rman Backup Fails with ORA-19510 and Ora-27037 : No such file or directory [ID 335609.1]
[/b]

Cause

The backup piece is being removed from disk before the backup finishes creating it. There was a scheduled cron purge job
that conflicted with the RMAN backup and was removing the piece before RMAN finished creating it.

Solution

Schedule the purge job to run at a different time to allow the RMAN backup job to complete or remove the purge job entirely.

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Tenha certeza que o diretório onde o backup está sendo gerado permaneça sem alterações até o final do Backup.
Sugiro a revisão do destino do Backup

Abs
Victor