Unable start DB after upgrade 7.0 to 7.2

we upgraded the the DB from 7.0 to 7.2 directly .Upgrade completed successfully .But not able to start the database using admintools .

vertica@lnxapp103:/apps/vertica/catalog/PHIDB/v_phidb_node0001_catalog> /opt/vertica/bin/admintools --tool start_db -d PHIDB -p BDVh3STe
Unable to read database catalogs - cannot start database.
Database PHIDB did not start successfully
vertica@lnxapp103:/apps/vertica/catalog/PHIDB/v_phidb_node0001_catalog> cd /home/
vertica@lnxapp103:/home> pwd
/home
vertica@lnxapp103:/home> echo -e "listdetails Site" |/opt/vertica/bin/vertica -D /apps/vertica/catalog/PHIDB/v_phidb_node0001_catalog/ -E'batch'
/opt/vertica/bin/vertica: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.11' not found (required by /opt/vertica/bin/vertica)

Please advise is this problem with direct upgrade from 7.0 to 7.2 ? is there is any solution on this?

Thanks
Renjith Alex