NPE during select call on a materialized table

17:44:22,307 ERROR [org.teiid.PROCESSOR] (Worker4_QueryProcessorQueue19) TEIID30019 Unexpected exception for request qruejSyXY+pR.0: java.lang.NullPointerException
    at org.teiid.query.optimizer.relational.RelationalPlanner.resolveVirtualGroup(RelationalPlanner.java:1233) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.query.optimizer.relational.RelationalPlanner.buildTree(RelationalPlanner.java:836) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.query.optimizer.relational.RelationalPlanner.createQueryPlan(RelationalPlanner.java:737) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.query.optimizer.relational.RelationalPlanner.createQueryPlan(RelationalPlanner.java:696) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.query.optimizer.relational.RelationalPlanner.generatePlan(RelationalPlanner.java:490) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.query.optimizer.relational.RelationalPlanner.optimize(RelationalPlanner.java:180) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.query.optimizer.QueryOptimizer.optimizePlan(QueryOptimizer.java:188) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.Request.generatePlan(Request.java:429) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.Request.processRequest(Request.java:449) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.RequestWorkItem.processNew(RequestWorkItem.java:534) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:278) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:49) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:217) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:241) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:118) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:288) [teiid-engine-8.0.0.Final.jar:8.0.0.Final]
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) [rt.jar:1.6.0_05]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) [rt.jar:1.6.0_05]
    at java.lang.Thread.run(Thread.java:619) [rt.jar:1.6.0_05]