So this ties up with a piece of work that a colleague is undertaking on the IBM PureApplication System.
As part of his work, he needs to update IBM Installation Manager (IIM) in place from 1.6.2 to 1.7.2
Here's the process: -
Before
$ /opt/IBM/InstallationManager/eclipse/tools/imcl listInstalledPackages
com.ibm.cic.agent_1.6.2000.20130301_2248
com.ibm.bpm.ADV.v85_8.5.1.20131107_1830
com.ibm.websphere.ND.v85_8.5.5001.20131018_2242
During
$ /tmp/foobar/userinstc -acceptLicense -dataLocation /home/wasadmin/var/ibm/InstallationManager/
Updated to com.ibm.cic.agent_1.7.2000.20140227_0303 in the /opt/IBM/InstallationManager/eclipse directory.
After
$ /opt/IBM/InstallationManager/eclipse/tools/imcl listInstalledPackages
com.ibm.cic.agent_1.7.2000.20140227_0303
com.ibm.bpm.ADV.v85_8.5.1.20131107_1830
com.ibm.websphere.ND.v85_8.5.5001.20131018_2242
The pre-requisite is that one must have IIM 1.7.2 downloaded from here and unpacked into /tmp/foobar.