Cannot complete the install because of a conflicting dependency.
Software being installed: Graphical Modeling Framework (GMF) Runtime SDK 1.5.0.v20110607-1200-67N09E9QnChoWswz-3wf_rz0kQ8Y (org.eclipse.gmf.runtime.sdk.feature.group 1.5.0.v20110607-1200-67N09E9QnChoWswz-3wf_rz0kQ8Y)
Software currently installed: Eclipse SDK 4.2.0.I20110916-1615 (org.eclipse.sdk.ide 4.2.0.I20110916-1615)
Only one of the following can be installed at once:
EMF Common 2.7.0.v20110916-1359 (org.eclipse.emf.common.feature.jar 2.7.0.v20110916-1359)
EMF Common 2.7.0.v20110605-0747 (org.eclipse.emf.common.feature.jar 2.7.0.v20110605-0747)
EMF Common 2.7.0.v20110912-0920 (org.eclipse.emf.common.feature.jar 2.7.0.v20110912-0920)