When either pre or post ws cleanup is run, it fails with exception

Deleting project workspace...
Cannot delete workspace :remote file operation failed: /home/dtcdt/projects/jenkins/workspace/CommonLib/label/Build-Win2003R2 at hudson.remoting.Channel@6701c06:Build-Win2003R2
ERROR: Publisher hudson.plugins.ws_cleanup.WsCleanup aborted due to exception
hudson.AbortException: Cannot delete workspace: remote file operation failed: /home/dtcdt/projects/jenkins/workspace/CommonLib/label/Build-Win2003R2 at hudson.remoting.Channel@6701c06:Build-Win2003R2
at hudson.plugins.ws_cleanup.WsCleanup.perform(WsCleanup.java:180)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:754)
at hudson.model.Build$BuildExecution.cleanUp(Build.java:192)
at hudson.model.Run.execute(Run.java:1710)
at hudson.matrix.MatrixRun.run(MatrixRun.java:146)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:246)
Finished: FAILURE