MyEclipse 保存文件 和 启动时-->Building workspace has encountered a problem. Errors during build

Building workspace has encountered a problem. Errors during build

首先必须退出MyEclipse工具 然后到自己的工作空间所在文件夹下: 例如（E:\我的项目\Java\B\.metadata\.plugins\org.eclipse.core.runtime\.settings\）下面删除文件com.genuitec.eclipse.ast.deploy.core.prefs

ok.