I have recovered SVN repository from crashed PC and now I can checkout files from few directories but in one place during checkout it says:
Error: REPORT of \'/s
When checking out I got the same error. The problem was indeed with specific revisions, so I did a workaround. It seemed that the revisions that raised the error had a long path. Another look on the specific revisions got me to think it might not need to be under source control. These files were generated automatically upon every build. I just kept another copy of the entire directory in a 'Deprecated' folder, and deleted the problematic files/folders. After the deletion, checkout was OK.