Upgrading RTC 2.x to RTC 3.0 using command line install

I am trying to upgrade a 2.0.0.2 installation to 3.0.
Platform is RHEL 5.6 64 bit on an Intel box. I am running this as root.

My 2.x installation has a non-standard context root (seemed like a good idea at the time) so I am trying to use the method described in http://jazz.net/library/article/524 - Tips for upgrading RTC 2.x to RTC 3.0. I have edited the silent-install-server.xml file as described, but when I run ./userinstc -dataLocation /tmp/silent-install/data -silent -showVerboseProgress -nosplash -input silent-install-server.xml I get the following error:

{IM install kit directory}/userinstc:
Problem in command line: -toolId ibmim -accessRights admin -toolId userinstc -accessRights nonAdmin -silent -repository @osgi.install.area install com.ibm.cic.agent_1.4.1000.20100810_1125,agent_core,agent_jre -dataLocation /tmp/silent-install/data -silent -showVerboseProgress -input /data/install/rtc3/cli/im/linux.gtk.x86/silent-install-server.xml
Unrecognized command line argument "-repository".

Use "help" command for information about available commands.

Here is my silent-install-server.xml file:

cat silent-install-server.xml
<xml>

<This>
<agent>
<server>
<TODO>
<repository>

</server>

<preference>
<preference>

<profile>

<include>
<data>

<override>
<data>
<user>
<data>
<data>
<data>
<data>

<override>
<data>
<user>
<data>
<data>

<set>
<!-- use to override platform detection:
<data>
-->

<set>
<!-- use to override platform detection:
<data>
-->

<disables>
<data>

</profile>

<install>
<offering>
<offering>
</install>
</agent>