我正在使用SourceTree应用程序，当我从svn获取时，我会收到此错误消息。我该如何解决这个问题。
Can't locate SVN/Core.pm in @INC (you may need to install the SVN::Core module) (@INC contains: /usr/local/git/lib/perl5/site_perl/5.18.2/darwin-thread-multi-2level /usr/local/git/lib/perl5/site_perl/5.18.2 /usr/local/git/lib/perl5/site_perl /Applications/SourceTree.app/Contents/Resources/git_local/lib/perl5/site_perl/5.18.2/darwin-thread-multi-2level /Applications/SourceTree.app/Contents/Resources/git_local/lib/perl5/site_perl/5.18.2 /Applications/SourceTree.app/Contents/Resources/git_local/lib/perl5/site_perl /Library/Perl/5.18/darwin-thread-multi-2level /Library/Perl/5.18 /Network/Library/Perl/5.18/darwin-thread-multi-2level /Network/Library/Perl/5.18 /Library/Perl/Updates/5.18.2 /System/Library/Perl/5.18/darwin-thread-multi-2level /System/Library/Perl/5.18 /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level /System/Library/Perl/Extras/5.18 .) at /usr/local/git/lib/perl5/site_perl/Git/SVN/Utils.pm line 6.
BEGIN failed--compilation aborted at /usr/local/git/lib/perl5/site_perl/Git/SVN/Utils.pm line 6.
Compilation failed in require at /usr/local/git/lib/perl5/site_perl/Git/SVN.pm line 25.
BEGIN failed--compilation aborted at /usr/local/git/lib/perl5/site_perl/Git/SVN.pm line 32.
Compilation failed in require at /Applications/SourceTree.app/Contents/Resources/git_local/libexec/git-core/git-svn line 25.
BEGIN failed--compilation aborted at /Applications/SourceTree.app/Contents/Resources/git_local/libexec/git-core/git-svn line 25.