NPE running match engine

[GoogleCodeExporter]

I tried to run a match engine in the debug mode and got the following 
exception:

java.lang.RuntimeException: java.lang.NullPointerException
    at 
ca.sqlpower.matchmaker.MatchEngineImpl.call(MatchEngineImpl.java:254)
    at 
ca.sqlpower.matchmaker.swingui.engine.EngineWorker.doStuff(EngineWorker.jav
a:117)
    at ca.sqlpower.swingui.SPSwingWorker.run(SPSwingWorker.java:104)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
    at 
ca.sqlpower.matchmaker.munge.MungeProcessor.call(MungeProcessor.java:71)
    at 
ca.sqlpower.matchmaker.munge.MungeProcessor.call(MungeProcessor.java:62)
    at 
ca.sqlpower.matchmaker.MatchEngineImpl.mungeAndMatch(MatchEngineImpl.java:2
81)
    at 
ca.sqlpower.matchmaker.MatchEngineImpl.call(MatchEngineImpl.java:229)
    ... 3 more

Original issue reported on code.google.com by bdietz.de on 13 Nov 2009 at 4:44