java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.jumpmind.util.LinkedCaseInsensitiveMap.convertKey(LinkedCaseInsensitiveMap.java:156)
at org.jumpmind.util.LinkedCaseInsensitiveMap.put(LinkedCaseInsensitiveMap.java:103)
at org.jumpmind.metl.core.runtime.component.Lookup.enhanceAndSend(Lookup.java:121)
at org.jumpmind.metl.core.runtime.component.Lookup.handle(Lookup.java:98)
at org.jumpmind.metl.core.runtime.flow.StepRuntime.processOnAnotherThread(StepRuntime.java:325)
at org.jumpmind.metl.core.runtime.flow.StepRuntime.process(StepRuntime.java:297)
at org.jumpmind.metl.core.runtime.flow.StepRuntime.run(StepRuntime.java:267)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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