error in invoking target 'irman ioracle' of makefile ins_rdbms.mk

Encountered below error in linking part in installation of 11gR2:
error in invoking target 'irman ioracle' of makefile ins_rdbms.mk

This error comes when required library is missing, disk temp space is low or swap space is low

 I had ensured all oracle rpms were installed prior to starting installation and oracle installer did not give any warning in prerequisites check so I was expecting something unusual. Swap space was filled 95% and it had only 5MB free space. So I increased swap space and selected retried option and it worked.

[oracle@node1 db_1]$ free -m
Swap:          511        458         53
 [root@node1 ~]# dd if=/dev/zero of=/swapfile1 bs=1024 count=524288
524288+0 records in
524288+0 records out
536870912 bytes (537 MB) copied, 2.304 s, 233 MB/s

[root@node1 ~]# mkswap /swapfile1
Setting up swapspace version 1, size = 524284 KiB
no label, UUID=5a8d2159-82d7-4a71-b13e-06dda43e128c
[root@node1 ~]# swapon /swapfile1
[root@node1 ~]# free -m
Swap:         1023        458        565
optionally if added swap space has to be made permanent then entry for /swapfile can be made in /etc/fstab

[root@node1 ~]# vi /etc/fstab
[root@node1 ~]# cat /etc/fstab
 .
.
/swapfile1 swap swap defaults 0 0
.
.