eclipse报错Missing Constraint: Require-Bundle: org.eclipse.emf.transaction;

今天新写了一个插件，用到了org.eclipse.emf.transaction，在产品配置种配置了以后仍然报错：

!ENTRY org.netliving.platforrm.workflow 4 0 2011-10-17 21:45:26.047
!MESSAGE
!STACK 0
org.osgi.framework.BundleException: The bundle "org.netliving.platforrm.workflow_1.0.0.beat [1486]" could not be resolved. Reason: Missing Constraint: Require-Bundle: org.eclipse.emf.transaction; bundle-version="1.4.0"
?at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolverError(AbstractBundle.java:1317)
?at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolutionFailureException(AbstractBundle.java:1301)
?at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:319)
?at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:374)
?at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1067)
?at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:561)
?at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:546)
?at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:459)
?at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
?at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:440)
?at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
?at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:337)

!ENTRY org.eclipse.osgi 4 0 2011-10-17 21:45:26.063
!MESSAGE Bundle reference:file:/E:/project/plugin/UniPlatform-init/ was not resolved.

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解决办法：

Run->Run Configurations...，选择相应的程序后选择Plugin标签，点击“Add Required Plugins”即可。