SEVERE: null
java.lang.ArrayIndexOutOfBoundsException: 0
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1012)
        at hudson.plugins.ws_cleanup.Cleanup.invoke(Cleanup.java:121)
        at hudson.FilePath.act(FilePath.java:784)
        at hudson.FilePath.act(FilePath.java:766)
        at hudson.plugins.ws_cleanup.WsCleanup.perform(WsCleanup.java:165)
        at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
        at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:697)
        at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:672)
        at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:650)
        at hudson.model.Build$RunnerImpl.cleanUp(Build.java:171)
        at hudson.model.Run.run(Run.java:1448)
        at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
        at hudson.model.ResourceController.execute(ResourceController.java:88)
        at hudson.model.Executor.run(Executor.java:238)

Jun 18, 2014 11:33:13 PM hudson.model.AbstractBuild$AbstractRunner performAllBuildSteps
WARNING: Publisher hudson.plugins.ws_cleanup.WsCleanup aborted due to exception
hudson.AbortException: Cannot delete workspace: 0
        at hudson.plugins.ws_cleanup.WsCleanup.perform(WsCleanup.java:180)
        at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
        at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:697)
        at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:672)
        at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:650)
        at hudson.model.Build$RunnerImpl.cleanUp(Build.java:171)
        at hudson.model.Run.run(Run.java:1448)
        at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
        at hudson.model.ResourceController.execute(ResourceController.java:88)
        at hudson.model.Executor.run(Executor.java:238)