解决 this virtual machine’s policies are too old to be run by this version of vmware workstation”

VMWare从6.0升级到9.0，打开以前的虚拟机报错如下：
“this virtual machine’s policies are too old to be run by this version of vmware workstation”
 
解决方法：
     http://www.wueblog.de/2012/08/vmware-fehlermeldung-this-virtual-machines-policies-are-too-old-to-be-run-by-this-version-of-vmware-workstation/ 

办法如下:

删除文件: Host.vmpl和Windows XP Professional.vmpl
打开文件：Windows XP Professional.vmx，删除里面的以下三行：
policy.vm.mvmtid ="xx"
policy.vm.managedVMTemplate = "TRUE"

policy.vm.managedVM = "FALSE"

重新打开即可。