When configuring the subversion repository to use filesystem URL : file:///home/cvs/svnroot/branches/clublead_3_4_x the plugin "Hudson Subversion Tagging Plug-in" fails to create a tag.

It fails if the tag base URL is absolute file:///home/cvs/svnroot/tags/clublead_3_4_22
and if it is relative is fails as well ../../tags/clublead_3_4_22

moduleLocation: Remote ->file:///home/cvs/svnroot/branches/clublead_3_4_x
Failed to parse tag base URL 'file:///home/cvs/svnroot/tags/clublead_3_4_27'. svn: Malformed URL 'file:/home/cvs/svnroot/tags'
There was no old tag at file:///home/cvs/svnroot/tags/clublead_3_4_27.
ERROR: Publisher hudson.plugins.svn_tag.SvnTagPublisher aborted due to exception
java.lang.NullPointerException
at org.tmatesoft.svn.core.wc.DefaultSVNRepositoryPool.createRepository(DefaultSVNRepositoryPool.java:218)
at org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:338)
at org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:330)
at org.tmatesoft.svn.core.wc.SVNCommitClient.doImport(SVNCommitClient.java:640)
at org.tmatesoft.svn.core.wc.SVNCommitClient.doImport(SVNCommitClient.java:523)
at hudson.plugins.svn_tag.SvnTagPlugin.perform(SvnTagPlugin.java:221)
at hudson.plugins.svn_tag.SvnTagPublisher.perform(SvnTagPublisher.java:111)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:582)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:563)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:550)
at hudson.model.Build$RunnerImpl.cleanUp(Build.java:158)
at hudson.model.Run.run(Run.java:1235)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:122)