Oracle Restoration Failing

Hi All,

We are getting below error during Oracle backup restoration. Kindly suggest what needs to be done ?

ORA-19507: failed to retrieve sequential file, handle="bk_109_1_819814167", parms=""

ORA-27029: skgfrtrv: sbtrestore returned error

ORA-19511: Error received from media manager layer, error text:

Failed to open backup file for restore.

OS : Solrais 10

NBU :- 7.5.0.4

Regards,

Sagar