The RCP downloads are meant as a base for building Eclipse RCP applications. As such, they do not include an application of their own and simply running the RCP install will do nothing. You can run an RCP application on AIX using the VM from IBM Developer Kit for AIX versions 1.4.2 and 5. The IBM Developer Kit for AIX can be downloaded from: http://www.ibm.com/developerworks/java/jdk/aix/service.html To run an RCP application on AIX, you must ensure that your AIX install includes the necessary filesets and service updates. Please use the following command to determine the service level of an AIX fileset on your machine: lslpp -l | grep FilesetName Please see the section below that corresponds to your AIX release. All AIX releases: Fileset X11.adt.lib must be installed (this is available on the AIX installation media). AIX Version 4.3.3: For fileset X11.base.lib: If service level < 4.3.3.79, you must apply APAR IY27694 For fileset X11.motif.lib: If service level > 4.3.3.81, you must apply APAR IY41939 AIX Version 5.1: For fileset X11.base.lib: If service level < 5.1.0.25, you must apply APAR IY27695 For fileset X11.motif.lib: If service level > 5.1.0.36, you must apply APAR IY41942 AIX Version 5.2: For fileset X11.motif.lib: If service level > 5.2.0.0, you must apply APAR IY41944 IBM APARs can be downloaded from: http://techsupport.services.ibm.com/server/fixes