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org.hibernate.MappingException: Could not determine type for: java.util.Collection, at table: paciente, for columns: [org.hibernate.mapping.Column(problemas)]	at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:349)	at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:322)	at org.hibernate.mapping.Property.isValid(Property.java:241)	at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:496)	at org.hibernate.mapping.RootClass.validate(RootClass.java:270)	at org.hibernate.cfg.Configuration.validate(Configuration.java:1360)	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1851)	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857)	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)	at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)	at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:75)	at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54)	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)	at org.openxava.jpa.XPersistence.getEntityManagerFactory(XPersistence.java:197)	at org.openxava.jpa.XPersistence.createManager(XPersistence.java:112)	at org.openxava.annotations.parse.AnnotatedClassParser.obtainManagedClassNamesUsingJPA(AnnotatedClassParser.java:2722)	at org.openxava.annotations.parse.AnnotatedClassParser.getManagedClassNames(AnnotatedClassParser.java:2637)	at com.openxava.naviox.impl.Initializer.init(Initializer.java:20)	at com.openxava.naviox.web.NaviOXFilter.doFilter(NaviOXFilter.java:30)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:409)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1044)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)