I'm using Subversion 1.5 and have a single file in a branch that I want to merge into another branch. When I do a svn merge http://path/to/file I get an error,
Cannot replace a directory from with .
Does this just mean that Subversion can't do this?
Try specifying the path to the local file as well.
For example,
svn merge -r1234:1235 svn://your_svn_url/to/file ./local_file
I think you need to do a
svn merge http://server/repos/path/to -r <REV>
where <REV> is the revision where the file was added. That way merge information is recorded (in case of a Subversion 1.5 or higher repository).