[rules-users] Newbie question / NoSuchMethodError error

[Cabou, Carl]

Greetings, 

I'm new to Drools and I've written a decision table based rule using excel.
The rule validates ok and I've deployed my package fine.

I've written a piece of code to test my rules, I want to set the calculatedRate to 125 when I get selected field equal to "0 - 50" : 

...
StatelessSession statelessSession = rb.newStatelessSession(); Data data=new Data(); data.setSelected("0 - 50"); statelessSession.execute(data); // set private Integer field ...

When I run the code I get a exeption : 

java.lang.NoSuchMethodError: java.lang.Integer.valueOf(I)Ljava/lang/Integer;

I don't understand why Drools tries to convert to Integer something which is already Integer !!!!

-----------
Here is the rules code.


rule "setCalculateRate_11"
	
	salience 65525
	when
		Data(selected == "0 - 50")
	then
		object.setCalculatedRate(125);
end


Does anybody has an idea ??

Regards,
Carl.