Target pool name expression in throw message event has unexpected behaviour. bug?

Hi,

I'm using Bonita 621and I'm trying to use an expression to setup the target pool name of the message. The throw event fails and in log I found the following cause: Caused by: org.bonitasoft.engine.expression.exception.SExpressionDependencyMissingException: The context to evaluate the data '[pool]' was not set at org.bonitasoft.engine.data.instance.api.DataExpressionExecutorStrategy.evaluate(DataExpressionExecutorStrategy.java:114) at org.bonitasoft.engine.expression.impl.ExpressionServiceImpl.evaluate(ExpressionServiceImpl.java:122) at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluateExpressionsOfKind(ExpressionResolverServiceImpl.java:161) at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluateExpressionsFlatten(ExpressionResolverServiceImpl.java:104) at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluate(ExpressionResolverServiceImpl.java:72) at org.bonitasoft.engine.core.expression.control.api.impl.ExpressionResolverServiceImpl.evaluate(ExpressionResolverServiceImpl.java:66) at org.bonitasoft.engine.execution.event.MessageEventHandlerStrategy.handleThrowMessage(MessageEventHandlerStrategy.java:188) at org.bonitasoft.engine.execution.event.MessageEventHandlerStrategy.handleThrowEvent(MessageEventHandlerStrategy.java:165) at org.bonitasoft.engine.execution.event.EventsHandler.handleThrowEvent(EventsHandler.java:228) at org.bonitasoft.engine.execution.StateBehaviors.handleThrowEvent(StateBehaviors.java:647)

The same when I'm using a process variable. Any suggestion?

Thank you, Cristian