You might have seen this weird Error that SVN throws up when a file checkin is aborted in while in progress. This leaves the ".svn" folder in your local setup in an inconsistent state. Faced this a couple of times in the last few days and this is what I did to get rid of the Error
On SVN Repository exploring (Eclipse) choose the immediate parent directory, do a checkout
This folder will now get created as an Eclipse Project in your Work space
Copy the directory path of this folder, "cd" to the folder.
Copy the ".svn" folder to the original folder which was corrupted
Restart Eclipse - Error got resolved.
Hope this helps !