SVN错误：svn：E200007：'org.tmatesoft.svn.core.wc2.SvnMerge'的跑步者

我想使用SVNKIT java API合并分支到trunk。SVN错误：svn：E200007：'org.tmatesoft.svn.core.wc2.SvnMerge'的跑步者

它的代码如下：

String branchURL = "<Branch URL>"; 

SVNURL branchSVNURL = SVNURL.parseURIDecoded(branchURL);//SVN Branch URL 

String WC_PATH= "<Some Path>";//This is the Working copy path which has the Trunk checked out 

File svnWorkingCopy = new File(WC_PATH); 

SVNDiffClient svnDiffClient;//This is initialized using SVNClientManager 

try{ 
     //doMerge(java.io.File path1, SVNRevision revision1, SVNURL url2, SVNRevision revision2, java.io.File dstPath, SVNDepth depth, boolean useAncestry, boolean force, boolean dryRun, boolean recordOnly) 
     svnDiffClient.doMerge(branchSVNURL, SVNRevision.HEAD,null,svnWorkingCopy,SVNDepth.INFINITY,false, false, false, false); 
    }catch(Exception e){ 
    e.printStackTrace(); 
    }

运行这段代码引发以下错误：

org.tmatesoft.svn.core.SVNException: svn: E200007: Runner for 'org.tmatesoft.svn.core.wc2.SvnMerge' command have not been found; probably not yet implement in this API. 
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:64) 
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:51) 
at org.tmatesoft.svn.core.wc2.SvnOperationFactory.getImplementation(SvnOperationFactory.java:1375) 
at org.tmatesoft.svn.core.wc2.SvnOperationFactory.run(SvnOperationFactory.java:1224) 
at org.tmatesoft.svn.core.wc2.SvnOperation.run(SvnOperation.java:294) 
at org.tmatesoft.svn.core.wc.SVNDiffClient.doMerge(SVNDiffClient.java:2389) 
at com.test.TestSVN.merge(TestSVN.java:109) 
at com.test.TestSVN.main(TestSVN.java:45)

我跑这一段代码与SVNKIT版本1.7.11和1.8.10并得到相同的错误。

SVN命令行等同于上面提到的代码是