Error: ORA-19870: error while restoring backup piece during NMO restoration

Hi,

I am getting below error while restoring oracle database....Any help?

channel CH5: reading from backup piece MDA_9qn57i96_1_1

channel CH2: ORA-19870: error while restoring backup piece MDA_9nn57i92_1_1

ORA-19507: failed to retrieve sequential file, handle="MDA_9nn57i92_1_1", parms=""

ORA-27029: skgfrtrv: sbtrestore returned error

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

   Could not locate the LNM save file 'MDA_9nn57i92_1_1' on server 'dc1bkpsrvr02.cidr.gov.in'. (2:9:2)

Backup and client OS: REDHAT

Bkp server Version: 7.6.3

Client bkp version: 7.6.2

NMO : 5.0