NullPointerException when setting checkout dir

Checking out WITHOUT setting the checkout dir property works. Setting the checkout dir property reports a NullPointerException.

Notice that I am using svn+ssh. I have an ssh key setup so I do not have to enter a password to login.

$ maven -e scm:checkout -Dmaven.scm.url=scm:svn:svn+ssh://svn.XXX.com/var/svn/itn/trunk -Dmaven.scm.checkout.dir=itn

build:start:

scm:find-connection:
[echo] Using connection: scm:svn:svn+ssh://svn.XXX.com/var/svn/itn/trunk

scm:checkout:
[echo] Checking out scm:svn:svn+ssh://svn.XXX.com/var/svn/itn/trunk

BUILD FAILED
org.apache.maven.scm.ScmException: Exception while executing SCM command.
at org.apache.maven.scm.command.AbstractCommand.execute(AbstractCommand.java:58)
at org.apache.maven.scm.provider.AbstractScmProvider.execute(AbstractScmProvider.java:85)
at org.apache.maven.scm.manager.DefaultScmManager.execute(DefaultScmManager.java:250)
at org.apache.maven.scm.manager.DefaultScmManager.checkOut(DefaultScmManager.java:141)
at org.apache.maven.plugins.scm.ScmBean.checkout(ScmBean.java:94)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.commons.jelly.impl.DynamicBeanTag.doTag(DynamicBeanTag.java:230)
at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:145)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:671)
at org.apache.maven.MavenSession.attainGoals(MavenSession.java:263)
at org.apache.maven.cli.App.doMain(App.java:488)
at org.apache.maven.cli.App.main(App.java:1239)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.werken.forehead.Forehead.run(Forehead.java:551)
at com.werken.forehead.Forehead.main(Forehead.java:581)
Caused by: java.lang.NullPointerException
at org.apache.maven.scm.provider.svn.command.checkout.SvnCheckOutCommand.createCommandLine(SvnCheckOutCommand.java:97)
at org.apache.maven.scm.provider.svn.command.checkout.SvnCheckOutCommand.executeCheckOutCommand(SvnCheckOutCommand.java:58)
at org.apache.maven.scm.command.checkout.AbstractCheckOutCommand.executeCommand(AbstractCheckOutCommand.java:45)
at org.apache.maven.scm.command.AbstractCommand.execute(AbstractCommand.java:54)
... 25 more
File...... C:\Documents and Settings\asoto\.maven\cache\maven-scm-plugin-1.5-beta-3\plugin.jelly
Element... scm:checkout
Line...... 110
Column.... 167
Exception while executing SCM command.
Total time: 4 seconds
Finished at: Sun May 22 22:51:27 PDT 2005