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    java.lang.NullPointerException
        at msi.gaml.architecture.simplebdi.SimpleBdiArchitecture.updateNormViolation(SimpleBdiArchitecture.java:5715)
        at msi.gaml.architecture.simplebdi.SimpleBdiArchitecture.executeOn(SimpleBdiArchitecture.java:352)
        at msi.gama.runtime.ExecutionScope.execute(ExecutionScope.java:380)
        at msi.gama.metamodel.agent.AbstractAgent.doStep(AbstractAgent.java:278)
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