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java.lang.OutOfMemoryError: Java heap space	at scalaz.DList$.fromList(DList.scala:78)	at scalaz.std.ListInstances$$anon$1.traverseImpl(List.scala:66)	at scalaz.std.ListInstances$$anon$1.traverseImpl(List.scala:14)	at scalaz.Traverse$Traversal.run(Traverse.scala:50)	at scalaz.Traverse$class.sequence(Traverse.scala:101)	at scalaz.std.ListInstances$$anon$1.sequence(List.scala:14)	at scalaz.syntax.TraverseOps.sequence(TraverseSyntax.scala:27)	at uk.gov.nationalarchives.csv.validator.AllErrorsMetaDataValidator$class.rulesForCell(AllErrorsMetaDataValidator.scala:62)	at uk.gov.nationalarchives.csv.validator.api.CsvValidator$$anon$2.rulesForCell(CsvValidator.scala:32)	at uk.gov.nationalarchives.csv.validator.MetaDataValidator$class.validateCell(MetaDataValidator.scala:275)	at uk.gov.nationalarchives.csv.validator.api.CsvValidator$$anon$2.validateCell(CsvValidator.scala:32)	at uk.gov.nationalarchives.csv.validator.AllErrorsMetaDataValidator$$anonfun$1.apply(AllErrorsMetaDataValidator.scala:44)	at uk.gov.nationalarchives.csv.validator.AllErrorsMetaDataValidator$$anonfun$1.apply(AllErrorsMetaDataValidator.scala:42)	at scala.collection.immutable.List.map(List.scala:273)	at uk.gov.nationalarchives.csv.validator.AllErrorsMetaDataValidator$class.rules(AllErrorsMetaDataValidator.scala:42)	at uk.gov.nationalarchives.csv.validator.api.CsvValidator$$anon$2.rules(CsvValidator.scala:32)	at uk.gov.nationalarchives.csv.validator.MetaDataValidator$class.validateRow(MetaDataValidator.scala:235)	at uk.gov.nationalarchives.csv.validator.api.CsvValidator$$anon$2.validateRow(CsvValidator.scala:32)	at uk.gov.nationalarchives.csv.validator.AllErrorsMetaDataValidator$class.validateRows$1(AllErrorsMetaDataValidator.scala:30)	at uk.gov.nationalarchives.csv.validator.AllErrorsMetaDataValidator$class.validateRows(AllErrorsMetaDataValidator.scala:35)	at uk.gov.nationalarchives.csv.validator.api.CsvValidator$$anon$2.validateRows(CsvValidator.scala:32)	at uk.gov.nationalarchives.csv.validator.MetaDataValidator$$anonfun$11.apply(MetaDataValidator.scala:186)	at uk.gov.nationalarchives.csv.validator.MetaDataValidator$$anonfun$11.apply(MetaDataValidator.scala:150)	at resource.AbstractManagedResource$$anonfun$5.apply(AbstractManagedResource.scala:86)	at scala.util.control.Exception$Catch$$anonfun$either$1.apply(Exception.scala:125)	at scala.util.control.Exception$Catch$$anonfun$either$1.apply(Exception.scala:125)	at scala.util.control.Exception$Catch.apply(Exception.scala:103)	at scala.util.control.Exception$Catch.either(Exception.scala:125)	at resource.AbstractManagedResource.acquireFor(AbstractManagedResource.scala:86)	at resource.DeferredExtractableManagedResource.either(AbstractManagedResource.scala:29)	at uk.gov.nationalarchives.csv.validator.MetaDataValidator$class.validateKnownRows(MetaDataValidator.scala:189)	at uk.gov.nationalarchives.csv.validator.api.CsvValidator$$anon$2.validateKnownRows(CsvValidator.scala:32)