[Hibernate & Hibernate tool] Erreur: ForeignKey.alignColumns(ForeignKey.java:100)

Bonjour,

Je suis en train d'essayer de générer mes fichiers hibernate avec Hibernate tool pour eclipse.
Lorsque que je veux générer les fichiers en reverse enginnering, Je me retrouve directement avec une NPE
voici le stack:

Code:

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java.lang.NullPointerException
	at org.hibernate.mapping.ForeignKey.alignColumns(ForeignKey.java:100)
	at org.hibernate.mapping.ForeignKey.alignColumns(ForeignKey.java:96)
	at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1310)
	at org.hibernate.cfg.JDBCMetaDataConfiguration.secondPassCompileForeignKeys(JDBCMetaDataConfiguration.java:33)
	at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1217)
	at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1162)
	at org.hibernate.eclipse.launch.CodeGenerationLaunchDelegate$2.execute(CodeGenerationLaunchDelegate.java:314)
	at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:63)
	at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:71)
	at org.hibernate.eclipse.launch.CodeGenerationLaunchDelegate.buildConfiguration(CodeGenerationLaunchDelegate.java:281)
	at org.hibernate.eclipse.launch.CodeGenerationLaunchDelegate.runExporters(CodeGenerationLaunchDelegate.java:214)
	at org.hibernate.eclipse.launch.CodeGenerationLaunchDelegate.launch(CodeGenerationLaunchDelegate.java:136)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:853)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:703)
	at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:866)
	at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1069)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

Une petite idée?

Merci