Could Not Locate LNM Save File

Hi all,

We are facing the RMAN restore issue with the following error. We have confirmed that the files are existed..Please let me knwo if you encounter thi before and what is the fix..Really appreciate your help..

ORA-19507: failed to retrieve sequential file, handle="c-3519156142-20080307-0e", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Could not locate the LNM save file 'c-3519156142-20080307-0e' on server 'penlegato07.pen.apac.dell.com'. (2:9:2)
failover to previous backup

channel t1: starting datafile backupset restore
channel t1: restoring control file
channel t1: reading from backup piece c-3519156142-20080307-0d
ORA-19870: error reading backup piece c-3519156142-20080307-0d
ORA-19507: failed to retrieve sequential file, handle="c-3519156142-20080307-0d", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Could not locate the LNM save file 'c-3519156142-20080307-0d' on server 'penlegato07.pen.apac.dell.com'. (2:9:2)
failover to previous backup