I get the following stack trace:

Looking for TAP test results that match the pattern [tools/**/t/**/*.tap].

Found [63] TAP test result(s).

Parsing TAP test result [/var/lib/jenkins/jobs/SBToolsBuild/workspace/tools/apps/t/spelling.t.tap].

<SNIP>

Parsing TAP test result [/var/lib/jenkins/jobs/SBToolsBuild/workspace/sbtools/help/helpsrc/t/spelling.t.tap].

ERROR: Publisher org.tap4j.plugin.TapPublisher aborted due to exception
java.lang.NullPointerException
at org.tap4j.plugin.TapPublisher.perform(TapPublisher.java:108)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:693)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:668)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:646)
at hudson.model.Build$RunnerImpl.post2(Build.java:162)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:615)
at hudson.model.Run.run(Run.java:1401)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:230)
Finished: FAILURE