CommVault Oracle Database backup fails with RMAN error: ORA-27211: Failed to load Media Management Library

We ran into the following error during the migration from Oracle backups taken with HP Data Protection (version 6.20) towards CommVault Simpana (version 10 service pack 8).

The first database backup executed with CommVault Simpana 10 throws the following error message. Please note the filesystem backups are perfectly conducted.
Description: RMAN Script execution failed with error [ORA-19554: error allocating device, device type: SBT_TAPE, device name: ]. Please check the Logs for more details.
Source: server, Process: ClOraAgent”

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