When using the "branch" goal of the maven-release-plugin, the following error occurs when the SVN URL of the working copy includes the username (e.g. svn+ssh://firstname.lastname@example.org/svn/test/trunk):
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.4.1:branch (default-cli) on project test: Unable to branch SCM
[ERROR] Provider message:
[ERROR] The svn branch command failed.
[ERROR] Command output:
[ERROR] svn: Source and dest appear not to be in the same repository (src: 'svn+ssh:; dst: 'svn+ssh://email@example.com/svn/test/branches/test-3.x')
This error is similar to the problem described by