java.lang.NullPointerException

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  • java.lang.NullPointerException at org.pentaho.di.trans.steps.groupby.GroupBy.newAggregate(GroupBy.java:571) at org.pentaho.di.trans.steps.groupby.GroupBy.processRow(GroupBy.java:159) at org.pentaho.di.trans.step.BaseStep.runStepThread(BaseStep.java:2889) at org.pentaho.di.trans.steps.groupby.GroupBy.run(GroupBy.java:781)
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