Queryplanner crash

Caused by: java.lang.NullPointerException
	at org.commcare.cases.query.queryset.DerivedCaseQueryLookup.performSetLookup(DerivedCaseQueryLookup.java:68)
	at org.commcare.cases.query.handlers.ModelQueryLookupHandler.loadProfileMatches(ModelQueryLookupHandler.java:53)
	at org.commcare.cases.query.handlers.ModelQueryLookupHandler.loadProfileMatches(ModelQueryLookupHandler.java:26)
	at org.commcare.cases.query.QueryPlanner.attemptProfiledQuery(QueryPlanner.java:36)
	at org.commcare.cases.util.StorageBackedTreeRoot.processPredicates(StorageBackedTreeRoot.java:178)
	at org.commcare.cases.util.StorageBackedTreeRoot.tryBatchChildFetch(StorageBackedTreeRoot.java:71)
	at org.javarosa.core.model.condition.EvaluationContext.expandReferenceAccumulator(EvaluationContext.java:326)
	at org.javarosa.core.model.condition.EvaluationContext.expandReference(EvaluationContext.java:277)
	at org.javarosa.core.model.condition.EvaluationContext.expandReference(EvaluationContext.java:253)
	at org.javarosa.xpath.XPathLazyNodeset.performEvaluation(XPathLazyNodeset.java:48)
	at org.javarosa.xpath.XPathLazyNodeset.unpack(XPathLazyNodeset.java:93)
	at org.javarosa.xpath.expr.FunctionUtils.unpack(FunctionUtils.java:417)
	at org.commcare.cases.util.StorageBackedTreeRoot.collectPredicateProfiles(StorageBackedTreeRoot.java:117)
	at org.commcare.cases.util.StorageBackedTreeRoot.tryBatchChildFetch(StorageBackedTreeRoot.java:66)
	at org.javarosa.core.model.condition.EvaluationContext.expandReferenceAccumulator(EvaluationContext.java:326)
	at org.javarosa.core.model.condition.EvaluationContext.expandReference(EvaluationContext.java:277)
	at org.javarosa.core.model.condition.EvaluationContext.expandReference(EvaluationContext.java:253)
	at org.javarosa.xpath.XPathLazyNodeset.performEvaluation(XPathLazyNodeset.java:48)
	at org.javarosa.xpath.XPathLazyNodeset.size(XPathLazyNodeset.java:125)
	at org.javarosa.xpath.expr.XPathCountFunc.evalBody(XPathCountFunc.java:25)
	at org.javarosa.xpath.expr.XPathFuncExpr.evalRaw(XPathFuncExpr.java:54)
	at org.javarosa.xpath.expr.XPathExpression.eval(XPathExpression.java:25)
	at org.javarosa.xpath.expr.XPathCmpExpr.evalRaw(XPathCmpExpr.java:29)
	at org.javarosa.xpath.expr.XPathExpression.eval(XPathExpression.java:25)
	at org.javarosa.xpath.expr.XPathBoolExpr.evalRaw(XPathBoolExpr.java:20)
	at org.javarosa.xpath.expr.XPathExpression.eval(XPathExpression.java:25)
	at org.javarosa.xpath.expr.XPathBoolExpr.evalRaw(XPathBoolExpr.java:27)
	at org.javarosa.xpath.expr.XPathExpression.eval(XPathExpression.java:25)
	at org.javarosa.xpath.expr.XPathBoolExpr.evalRaw(XPathBoolExpr.java:27)
	at org.javarosa.xpath.expr.XPathExpression.eval(XPathExpression.java:25)
	at org.javarosa.xpath.expr.XPathBoolExpr.evalRaw(XPathBoolExpr.java:20)
	at org.javarosa.xpath.expr.XPathExpression.eval(XPathExpression.java:25)
	at org.javarosa.core.model.condition.EvaluationContext.expandReferenceAccumulator(EvaluationContext.java:364)
	at org.javarosa.core.model.condition.EvaluationContext.expandReference(EvaluationContext.java:277)
	at org.javarosa.core.model.condition.EvaluationContext.expandReference(EvaluationContext.java:253)
	at org.commcare.util.screen.EntityScreen.expandEntityReferenceSet(EntityScreen.java:94)
	at org.commcare.util.screen.EntityScreen.init(EntityScreen.java:72)
	at session.MenuSession.getNextScreen(MenuSession.java:182)
	at session.MenuSession.handleInput(MenuSession.java:160)