path is not a working copy 是什么意思?该怎么解决

path is not a working copy 是什么意思?
Svn Cleanup
Reason:
Org.tigris.subversion.javah1.ClienException: path is not a working copy
Directoty
Svn:’E:\workspace\jxkh\WebRoot\WEB-INF\classes’ is not a working copy 
Directory


[解决办法]
是不是被你移动过？