Problem with width of Relation

This is the error that I get when running two GenericJobLauncher actors in parallel, considering the Realtion "width" parameter to be of value "Auto":
ptolemy.kernel.util.IllegalActionException: Channel index 1 is out of range, because width is only 1.
[null] in .tp.Mapping_8.bwa-mem_1.dependentJob
[null] at ptolemy.actor.IOPort.get(IOPort.java:917)
[null] at org.kepler.actor.job.GenericJobLauncher.fire(GenericJobLauncher.java:427)
[null] at ptolemy.actor.process.ProcessThread._iterateActor(ProcessThread.java:335)
[null] at ptolemy.actor.process.ProcessThread.run(ProcessThread.java:212)
[null] Sending MOML application type casted to SangenixMOML: org.kepler.bridge.SangenixMoMLCommandKLineApplication@7b29c61f