Installation Manager v1.4.3 has changed how users indicate acceptance of the software license terms and conditions from an attribute in the user provided Response.xml file to a parameter passed on Installation Manager invocation.
Rational Developer for System z v8.0.2 or higher includes an update that synchronizes the Developer for System z invocation of Installation Manager with this change. Once Developer for System z v8.0.2 or higher is installed, you can install future updates using the push-to-client feature with Installation Manager v1.4.3 or higher.
Workaround: Update Rational Developer for System z to v8.0.2 before updating Installation Manager v1.4.2 to a newer version of Installation Manager. If you have already updated to Installation Manager v1.4.3 or higher, manually install Rational Developer for System z v8.0.2 or higher without using the push-to-client feature.