Hi!
I've a problem to delete on cascade child rows.
I've two classes:

Parent: Circuito

<class name="es.gematic.workflowcam.entities.Circuito" table="workflow_circuito" >
<id name="idCircuito" type="java.lang.Integer">
<column name="circuito" />
<generator class="increment" />
</id>
<set name="firmas" inverse="true" cascade="all" lazy="false">
<key on-delete="cascade">
<column name="circuito" not-null="true" />
</key>
<one-to-many class="es.gematic.workflowcam.entities.Firma" />
</set>
</class>

Child: Firma

<hibernate-mapping>
<class name="es.gematic.workflowcam.entities.Firma" table="workflow_firmas" >
<id name="idFirma" type="java.lang.Integer">
<column name="firma" />
<generator class="increment" />
</id>
<many-to-one name="circuito" class="es.gematic.workflowcam.entities.Circuito" fetch="select" >
<column name="circuito" not-null="true" />
</many-to-one>
</hibernate-mapping>

When i try to delete the parent I would delete the childrens too but i obtain this Log error:
Should not remove the children too?

Thank you for the answers!

Hibernate: delete from workflow_circuito where circuito=?
10-jul-2009 11:20:44 org.hibernate.util.JDBCExceptionReporter logExceptions
ADVERTENCIA: SQL Error: -692, SQLState: 23000
10-jul-2009 11:20:44 org.hibernate.util.JDBCExceptionReporter logExceptions
GRAVE: Key value for constraint (ids731.pk_circuito) is still being referenced.
10-jul-2009 11:20:44 org.hibernate.event.def.AbstractFlushingEventListener performExecutions
GRAVE: Could not synchronize database state with session
org.hibernate.exception.ConstraintViolationException: could not delete: [es.gematic.workflowcam.entities.Circuito#2]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2541)
at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2697)
at org.hibernate.action.EntityDeleteAction.execute(EntityDeleteAction.java:74)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:146)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at es.gematic.workflowcam.dao.BasicDAO.commitTransaction(BasicDAO.java:30)
at es.gematic.workflowcam.dao.BasicDAO.delete(BasicDAO.java:103)
at es.gematic.workflowcam.actions.CircuitoMgr.delete(CircuitoMgr.java:143)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:440)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:279)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:249)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at es.gematic.workflowcam.interceptors.RedirectMessageInterceptor.doIntercept(RedirectMessageInterceptor.java:50)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:148)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at es.gematic.workflowcam.interceptors.LoginInterceptor.intercept(LoginInterceptor.java:62)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.TimerInterceptor.invokeUnderTiming(TimerInterceptor.java:124)
at com.opensymphony.xwork2.interceptor.TimerInterceptor.intercept(TimerInterceptor.java:111)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:468)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
Caused by: java.sql.SQLException: Key value for constraint (ids731.pk_circuito) is still being referenced.
at com.informix.jdbc.IfxSqli.addException(IfxSqli.java:3105)
at com.informix.jdbc.IfxSqli.receiveError(IfxSqli.java:3419)
at com.informix.jdbc.IfxSqli.dispatchMsg(IfxSqli.java:2282)
at com.informix.jdbc.IfxSqli.receiveMessage(IfxSqli.java:2202)
at com.informix.jdbc.IfxSqli.executeCommand(IfxSqli.java:724)
at com.informix.jdbc.IfxResultSet.executeUpdate(IfxResultSet.java:310)
at com.informix.jdbc.IfxStatement.executeUpdateImpl(IfxStatement.java:885)
at com.informix.jdbc.IfxPreparedStatement.executeUpdate(IfxPreparedStatement.java:279)
at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:23)
at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2520)
... 70 more

Nobody knows what happens?