If you have previously installed your workflow Feature, but you have changed your workflow's Feature manifest.xml files, uninstall and reinstall the Feature using stsadm.
如果已经安装了工作流，后来又修改了工作流的manifest . xml文件，请使用stsadm卸载并重新安装工作流。
youdao
应用推荐
模块上移
模块下移
不移动