eclipse中导入activiti报错所需四个jar包

org.eclipse.emf.validation.ui_1.7.0.201403111711.jar、org.eclipse.emf.workspace_1.5.1.201306111400.jar、org.eclipse.emf.validation_1.8.0.201403111711.jarorg.eclipse.emf.transaction_1.4.0.201306111400.jar；四个jar包