Error in origin port of fork channel

Obtained when generating executable code from the ZigBee model, with the Nokia plugin.

Exception in thread "Thread-3" java.lang.NullPointerException at tmltranslator.TMLChannel.toXML(TMLChannel.java:509) at tmltranslator.TMLModeling.toXML(TMLModeling.java:2495) at tmltranslator.TMLMapping.toXML(TMLMapping.java:1676) at ui.window.JDialogCCodeGeneration.generateCode(JDialogCCodeGeneration.java:522) at ui.window.JDialogCCodeGeneration.run(JDialogCCodeGeneration.java:409) at java.lang.Thread.run(Thread.java:748)