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

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This exception has no message.
java.lang.NullPointerException:
at com.techtrader.modules.jdo.impl.jdbc.runtime.JDBCExpressionFactory.(JDBCExpressionFactory.java:37)
at com.techtrader.modules.jdo.impl.jdbc.runtime.JDBCQuery.getExpressionFactory(JDBCQuery.java:40)
at com.techtrader.modules.jdo.query.QueryImpl.getExpression(QueryImpl.java:367)
at com.techtrader.modules.jdo.impl.jdbc.runtime.JDBCQuery.getExpression(JDBCQuery.java:49)
at com.techtrader.modules.jdo.query.QueryImpl.executeWithMap(QueryImpl.java:312)
at com.techtrader.modules.jdo.query.QueryImpl.execute(QueryImpl.java:279)
at com.bridgecanada.dao.StateTest.testSelect(StateTest.java:37)

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