Remote system error - Network is unreachable

Hi Experts...!

Kindly help us to solve the below error. 

--- Job Indications ---
Unable to create session channel with nsrexecd on host neswtr10btcfsp1.ad.oilinfra.com to execute command 'savefs -s bus-nwsrv-02-bu -c neswtr10btcfsp1.ad.oilinfra.com -g NESTE_DD_SYBASE_LOG_HOURLY3 -p -l full -R -v -F "D:\\"': Remote system error - Network is unreachable
neswtr10btcfsp1.ad.oilinfra.com:savefs: retried 1 times.

Ping , telenet, nsrexecd are working fine from both client and backup server  end

need your help to work on this as i am new to the networker concept