svn checkout with netbeans returns an error

I have removed a data directory from my java source code. now when i try to commit source then i get the following error.

org.tigris.subversion.javahl.ClientException: Working copy is corrupt
Commit failed (details follow):
Entry for 'directory' has no URL

i get the same error when i remove a file. what is the reason. i am checking out o开发者_Python百科n google code project website.

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Which data directory did you removed? The ".svn" folders ? If yes than you should checkout a fresh working copy and continue working there.