Restore xxxxx.backup database

Help needed to restore a backup database!

1. Postgres service was started. When I run a restore command for the backup stored in /tmp (backed from another server working on this database and sent to meby email by another user). I created a database by the same name "royapuram" by using createdb in template1 and then ran the following command:

[root@adccs ~]# /usr/bin/pg_restore -a /tmp/royapuram.backup
ERROR: pg_restore: [archiver] unsupported version (1.10) in file header

2. Alternatively I used (after creating "royapuram" database
[root@adccs ~]# su - postgres
-bash-3.00$ psql royapuram  < /tmp/royapuram.backup;
RESULT
ERROR:  syntax error at or near "
" at character 1
and the whole terminal churns up junk characters and stops!

What  do I do to restore!!
Regards

K. Rajaraman