[jbpm-users] Installation error

I'm getting this error: 2009/02/19 3:12:41 PM [0x0-0x244244].com.apple.JarLauncher[28435] Caused by: /opt/alfresco/jbpm-3.2.5.GA/Uninstaller/download-helper.xml:17: Error while expanding /opt/alfresco/jbpm-3.2.5.GA/Uninstaller/jboss-5.0.0.GA.zip As you can see, I'm installing it an a mac. There's over 4Gb on the drive, so it can't be a space problem. The install script re-tries this a number of times as I've multiple copies of the error. Any suggestions?