There are two Rule task in the process.

Content of the first Rule task:
rule "Your First Rule"
ruleflow-group "rfgroup"
dialect "mvel"
when
p: java.awt.Point(x==10)
then
p.x=20;
System.out.println("Rule fired");
end

Content of the second Rule task:
rule "Your Second Rule"
ruleflow-group "rfgroup2"
dialect "mvel"
when
java.awt.Point(x==20)
then
System.out.println("Rule 2 fired")
end

The problem is, that the second rule is never fired - change ot he Point object is not transfered.