@CollectionOfElements cannot be parsed into hbm xml mapping

I have an annotated entity which uses @CollectionOfElements annotation. When using hibernate tools to generate the corresponding hbm xml files I get an exception on this annotation.

Stacktrace:

11:59:21,447 INFO org.hibernate.tool.Version - Hibernate Tools 3.2.0.b9
11:59:22,057 ERROR freemarker.runtime -
Expression property.getValue().getElement().referencedEntityName is undefined on
line 22, column 41 in hbm/bag.hbm.ftl.
The problematic instruction:
---------- ==> ${property.getValue().getElement().referencedEntityName} [on line 22, column
39 in hbm/bag.hbm.ftl]
in include "${c2h.getTag(property)}.hbm.ftl" [on line 93, column 1 in hbm/persi
stentclass.hbm.ftl]
in include "persistentclass.hbm.ftl" [on line 34, column 1 in hbm/hibernate-map
ping.hbm.ftl]
----------
Java backtrace for programmers:
---------- freemarker.core.InvalidReferenceException: Expression property.getValue().getEle
ment().referencedEntityName is undefined on line 22, column 41 in hbm/bag.hbm.ft
l.
at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)

at freemarker.core.Expression.getStringValue(Expression.java:118)
at freemarker.core.Expression.getStringValue(Expression.java:93)
at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.IfBlock.accept(IfBlock.java:82)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.include(Environment.java:1375)
at freemarker.core.Include.accept(Include.java:155)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:160)

at freemarker.core.Environment.visit(Environment.java:351)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:95)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.include(Environment.java:1375)
at freemarker.core.Include.accept(Include.java:155)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.process(Environment.java:176)
at freemarker.template.Template.process(Template.java:231)
at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelpe
r.java:247)
at org.hibernate.tool.hbm2x.TemplateProducer.produceToString(TemplatePro
ducer.java:67)
at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.ja
va:28)
at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.ja
va:97)
at org.hibernate.tool.hbm2x.GenericExporter.exportPOJO(GenericExporter.j
ava:146)
at org.hibernate.tool.hbm2x.GenericExporter.exportPersistentClass(Generi
cExporter.java:135)
at org.hibernate.tool.hbm2x.GenericExporter$2.process(GenericExporter.ja
va:41)
at org.hibernate.tool.hbm2x.GenericExporter.doStart(GenericExporter.java
:126)
at org.hibernate.tool.hbm2x.HibernateMappingExporter.doStart(HibernateMa
ppingExporter.java:34)
at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java
:95)
at org.codehaus.mojo.hibernate3.HibernateExporterMojo.doExecute(Hibernat
eExporterMojo.java:241)
at org.codehaus.mojo.hibernate3.HibernateExporterMojo.execute(HibernateE
xporterMojo.java:140)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPlugi
nManager.java:451)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa
ultLifecycleExecutor.java:558)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandalone
Goal(DefaultLifecycleExecutor.java:512)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(Defau
ltLifecycleExecutor.java:482)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHan
dleFailures(DefaultLifecycleExecutor.java:330)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmen
ts(DefaultLifecycleExecutor.java:291)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi
fecycleExecutor.java:142)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)

at org.codehaus.classworlds.Launcher.main(Launcher.java:375)