16:47:29 java.lang.NullPointerException
16:47:29 	at hudson.model.queue.FutureImpl.cancel(FutureImpl.java:78)
16:47:29 	at com.tikal.jenkins.plugins.multijob.MultiJobBuilder.perform(MultiJobBuilder.java:162)
16:47:29 	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
16:47:29 	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:785)
16:47:29 	at hudson.model.Build$BuildExecution.build(Build.java:199)
16:47:29 	at hudson.model.Build$BuildExecution.doRun(Build.java:160)
16:47:29 	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:566)
16:47:29 	at com.tikal.jenkins.plugins.multijob.MultiJobBuild$MultiJobRunnerImpl.run(MultiJobBuild.java:70)
16:47:29 	at hudson.model.Run.execute(Run.java:1677)
16:47:29 	at hudson.model.Run.run(Run.java:1624)
16:47:29 	at com.tikal.jenkins.plugins.multijob.MultiJobBuild.run(MultiJobBuild.java:63)
16:47:29 	at hudson.model.ResourceController.execute(ResourceController.java:88)
16:47:29 	at hudson.model.Executor.run(Executor.java:230)