executng ant task svn < target name = "svnversion" > < exec executable = "svnversion" outputproperty = "svnversion" /> < echo message = "SVN Version: ${svnversion}" /> </ target > ------------------------------------------------------------------------ svnversion : [ exec ] Result: 1 [ echo ] SVN Version: svn: E155021: This client is too old to work with the working copy at [ echo ] '/Users/hongsangbeom/Documents/workspace-kjb/OrchestraFrameworkAndroid_kjb' (format 31). [ echo ] You need to get a newer Subversion client. For more details, see [ echo ] http://subversion.apache.org/faq.html#working-copy-format-change os: osx svn client too old, i should update svn client. svn --version -------------------------------- svn, version 1.7.19 (r1643991) to install follow link : http://www.blastar.biz/2014/10/