When I use envinject plugin to load a property file, I have this error in "Subversion Polling Log" :

Started on Jul 17, 2012 2:01:00 PM
ERROR: Failed to record SCM polling for hudson.model.FreeStyleProject@333e9df3[MY_PROJECT]
java.lang.NullPointerException
at java.util.TreeMap.putAll(TreeMap.java:290)
at org.jenkinsci.plugins.envinject.EnvInjectBuilderContributionAction.buildEnvVars(EnvInjectBuilderContributionAction.java:23)
at hudson.model.AbstractBuild.getEnvironment(AbstractBuild.java:867)
at hudson.scm.SubversionSCM.compareRemoteRevisionWith(SubversionSCM.java:1114)
at hudson.scm.SCM._compareRemoteRevisionWith(SCM.java:356)
at hudson.scm.SCM.poll(SCM.java:373)
at hudson.model.AbstractProject.poll(AbstractProject.java:1377)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:420)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:449)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)