IBM Installation Manager - 32 vs. 64 bits

So I'm seeing: -

ERROR: The 32-bit IBM▒ Installation Manager package cannot be installed in a 64-bit package group.

 when trying to install IBM Installation Manager 1.6.2, WAS 8.5.5.2 and IBM BPM 8.5.0.1 on a 64-bit AIX LPAR.

I've seen similar issues before: -

WebSphere Application Server on AIX - 64 bits, no buts

This time around, the solution was to change my response file ( I have one file for all the products, including IIM ) from: -

...

<profile id='IBM Installation Manager' installLocation='/opt/IBM/InstallationManager/eclipse' kind='self'>
<data key='eclipseLocation' value='/opt/IBM/InstallationManager/eclipse'/>
<data key='user.import.profile' value='false'/>
<data key='cic.selector.os' value='aix'/>
<data key='cic.selector.arch' value='ppc64'/>
<data key='cic.selector.ws' value='gtk'/>
<data key='cic.selector.nl' value='de,no,fi,ru,hr,fr,hu,sk,sl,sv,ko,el,en,pt_BR,it,iw,zh,es,cs,ar,zh_HK,zh_TW,th,ja,pl,da,tr,nl'/>
</profile>
...

<profile id='IBM WebSphere Application Server V8.5' installLocation='/opt/IBM/WebSphere/AppServer'>
<data key='eclipseLocation' value='/opt/IBM/WebSphere/AppServer'/>
<data key='user.import.profile' value='false'/>
<data key='cic.selector.os' value='aix'/>
<data key='cic.selector.arch' value='ppc'/>
<data key='cic.selector.ws' value='motif'/>
<data key='cic.selector.nl' value='en'/>
</profile>
...

to: -

...

<profile id='IBM Installation Manager' installLocation='/opt/IBM/InstallationManager/eclipse' kind='self'>
<data key='eclipseLocation' value='/opt/IBM/InstallationManager/eclipse'/>
<data key='user.import.profile' value='false'/>
<data key='cic.selector.os' value='aix'/>
<data key='cic.selector.arch' value='ppc'/>
<data key='cic.selector.ws' value='gtk'/>
<data key='cic.selector.nl' value='de,no,fi,ru,hr,fr,hu,sk,sl,sv,ko,el,en,pt_BR,it,iw,zh,es,cs,ar,zh_HK,zh_TW,th,ja,pl,da,tr,nl'/>
</profile>
...

<profile id='IBM WebSphere Application Server V8.5' installLocation='/opt/IBM/WebSphere/AppServer'>
<data key='eclipseLocation' value='/opt/IBM/WebSphere/AppServer'/>
<data key='user.import.profile' value='false'/>
<data key='cic.selector.os' value='aix'/>
<data key='cic.selector.arch' value='ppc'/>
<data key='cic.selector.ws' value='motif'/>
<data key='cic.selector.nl' value='en'/>
</profile>
...

In other words, ensure that the cic.selector.arch is consistently set to ppc rather than  a mixture of ppc and ppc64.

Sorted :-)