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

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java.lang.NullPointerException:
at jetbrains.mps.lang.structure.generator_new.baseLanguage.QueriesGenerated$1.accept(QueriesGenerated.java:211)
at jetbrains.mps.lang.structure.generator_new.baseLanguage.QueriesGenerated$1.accept(QueriesGenerated.java:209)
at jetbrains.mps.internal.collections.runtime.IWhereFilter.invoke(IWhereFilter.java:12)
at jetbrains.mps.internal.collections.runtime.impl.FilteringSequence$FilteringIterator.moveToNext(FilteringSequence.java:63)
at jetbrains.mps.internal.collections.runtime.impl.FilteringSequence$FilteringIterator.hasNext(FilteringSequence.java:34)
at jetbrains.mps.internal.collections.runtime.IterableUtils.count(IterableUtils.java:46)
at jetbrains.mps.lang.structure.generator_new.baseLanguage.QueriesGenerated.referenceMacro_GetReferent_5023950685592203880(QueriesGenerated.java:214)
at sun.reflect.GeneratedMethodAccessor175.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at jetbrains.mps.util.QueryMethodGenerated$2.invoke(QueryMethodGenerated.java:206)
at jetbrains.mps.generator.impl.reference.MacroResolver.resolve(MacroResolver.java:47)
at jetbrains.mps.generator.impl.reference.RefResolver$RefResolverAdapter.resolve(RefResolver.java:92)
at jetbrains.mps.generator.impl.reference.ReferenceInfo_Macro.expandReferenceMacro(ReferenceInfo_Macro.java:61)
at jetbrains.mps.generator.impl.reference.ReferenceInfo_Macro.create(ReferenceInfo_Macro.java:45)
at jetbrains.mps.generator.impl.reference.PostponedReference.initReplacementReference(PostponedReference.java:120)
at jetbrains.mps.generator.impl.reference.PostponedReferenceUpdate.prepare(PostponedReferenceUpdate.java:44)
at jetbrains.mps.generator.impl.TemplateGenerator.apply(TemplateGenerator.java:240)
at jetbrains.mps.generator.impl.GenerationSession.applyRules(GenerationSession.java:504)
at jetbrains.mps.generator.impl.GenerationSession.executeMajorStepInternal(GenerationSession.java:404)
at jetbrains.mps.generator.impl.GenerationSession.executeMajorStep(GenerationSession.java:361)
at jetbrains.mps.generator.impl.GenerationSession.generateModel(GenerationSession.java:239)
at jetbrains.mps.generator.impl.GenerationController.generateModel(GenerationController.java:131)
at jetbrains.mps.generator.impl.GenerationController.generate(GenerationController.java:65)
at jetbrains.mps.generator.GenerationFacade$3$1.compute(GenerationFacade.java:268)
at jetbrains.mps.generator.GenerationFacade$3$1.compute(GenerationFacade.java:265)
at jetbrains.mps.ide.undo.WorkbenchUndoHandler.runNonUndoableAction(WorkbenchUndoHandler.java:52)
at jetbrains.mps.smodel.UndoHelper.runNonUndoableAction(UndoHelper.java:63)
at jetbrains.mps.generator.GenerationFacade$3.run(GenerationFacade.java:265)
at jetbrains.mps.smodel.WorkbenchModelAccess$2.run(WorkbenchModelAccess.java:105)
at jetbrains.mps.smodel.WorkbenchModelAccess.runReadAction(WorkbenchModelAccess.java:100)
at jetbrains.mps.smodel.ModelAccessBase.runReadAction(ModelAccessBase.java:53)
at jetbrains.mps.generator.GenerationFacade.process0(GenerationFacade.java:262)
at jetbrains.mps.generator.GenerationFacade.process(GenerationFacade.java:226)
at jetbrains.mps.lang.core.plugin.Generate_Facet$Target_generate$1.execute(Generate_Facet.java:480)
at jetbrains.mps.internal.make.runtime.script.Script$3.invoke(Script.java:292)
at jetbrains.mps.internal.make.runtime.script.Script$3.invoke(Script.java:235)
at jetbrains.mps.ide.make.WorkbenchMakeService$Controller.runJobWithMonitor(WorkbenchMakeService.java:330)
at jetbrains.mps.internal.make.runtime.script.Script.executeTargets(Script.java:235)
at jetbrains.mps.internal.make.runtime.script.Script.execute(Script.java:213)
at jetbrains.mps.make.service.CoreMakeTask$1.invoke(CoreMakeTask.java:103)
at jetbrains.mps.make.dependencies.MakeSequence.iterate(MakeSequence.java:53)
at jetbrains.mps.make.service.CoreMakeTask.doRun(CoreMakeTask.java:77)
at jetbrains.mps.ide.make.MakeTask$WorkbenchMakeTask.doRun(MakeTask.java:146)
at jetbrains.mps.make.service.CoreMakeTask.run(CoreMakeTask.java:56)
at java.lang.Thread.run(Thread.java:745)

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