Adding a second project to the projects to build in 'Post build Actions'
results in only the first project being triggered and this message concerning an NPE at the end of the parent log.

BUILD SUCCESSFUL
Total time: 7 minutes 40 seconds
Warning: you have no plugins providing access control for builds, so falling back to legacy behavior of permitting any downstream builds to be triggered
Triggering a new build of prowess_intel #651
FATAL: null
java.lang.NullPointerException
at hudson.model.Result.isBetterOrEqualTo(Result.java:125)
at jenkins.triggers.ReverseBuildTrigger.shouldTrigger(ReverseBuildTrigger.java:133)
at jenkins.triggers.ReverseBuildTrigger.access$000(ReverseBuildTrigger.java:83)
at jenkins.triggers.ReverseBuildTrigger$1.shouldTriggerBuild(ReverseBuildTrigger.java:140)
at hudson.tasks.BuildTrigger.execute(BuildTrigger.java:243)
at hudson.model.AbstractBuild$AbstractBuildExecution.cleanUp(AbstractBuild.java:674)
at hudson.model.Build$BuildExecution.cleanUp(Build.java:193)
at hudson.model.Run.execute(Run.java:1752)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:231)