the reason
Documents submitted before using SVN / folder is marked as "add" state, waiting to be added to the warehouse.
At this point if you delete this file, when SVN submitted or will try to submit this document, although its status is already "missing" a.
Solutions
First clip directly revert error in the file, and then select all.
All the original files downloaded, and then do the corresponding treatment.
Resubmit again.
Common commands
Information Warehouse
$ svn info
Reference material
Original: Big Box SVN in Practice