[rules-users] How can I use retract in action or exception handler?

[EugeneP]

Good afternoon

How can I use retract in action or exception handler?
For example,
0. I have a flow diagram;
1. in some node the fact Person( age == 10) is added to the working memory
by 'insert';
2. after some steps, the split node pass the control to the action-node
3. and in this action I need to retract this fact. How?!
The action MVEL code like:

$t : Person( age==10)
retract($t)

- does not work b/c of knowledge base errors:
"Could not parse knowledge... "
"Unable to build expression for action... "
"java.lang.Class cannot be cast to org.mvel2.util.MethodStub :
org.drools.lang.descr.ProcessDescr at fa54fe"

Thanks,
    Eugene P
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