requires \“org.eclipse.emf.transaction 1.4.0\“ but it could not be found

今天在eclipse中安装activiti插件过程中遇到无法安装的问题 提示的错误信息：Cannot complete the install because one or more required items could not be found Software being installed: Activiti Eclipse BPMN 2 0 Designer 5 12 0 org activiti designer feature feature group 5 8 0 Missing requirement: Activiti Eclipse BPMN 2 0 Designer 5 12 0 org activiti designer feature feature group 5 8 0 requires "org eclipse emf transaction 1 4 0" but it could not be found">今天在eclipse中安装activiti插件过程中遇到无法安装的问题 提示的错误信息：Cannot complete the install because one or more required items could not be found Software being installed: Activiti Eclipse BPMN 2 0 Designer 5 12 0 org activiti designer feature feature group [更多]

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件      166694  2014-04-10 15:59  eclipse安装activiti需装eclipse插件20140410\org.eclipse.emf.transaction_1.4.0.201306111400.jar
     文件       74151  2014-04-10 15:59  eclipse安装activiti需装eclipse插件20140410\org.eclipse.emf.validation.ui_1.7.0.201403111711.jar
     文件      404589  2014-04-10 15:59  eclipse安装activiti需装eclipse插件20140410\org.eclipse.emf.validation_1.8.0.201403111711.jar
     文件       84268  2014-04-10 15:59  eclipse安装activiti需装eclipse插件20140410\org.eclipse.emf.workspace_1.5.1.201306111400.jar
     文件         396  2014-04-10 16:28  eclipse安装activiti需装eclipse插件20140410\报错说明.txt
     目录           0  2014-04-10 16:28  eclipse安装activiti需装eclipse插件20140410\