Hello,
I want to use StatelessSession with spreadsheet. I wrote few rules in DRL, but I cant do it in spreadsheet. First I want to present rules and class that is used by rules:

public class CProduct {

    private String name;
    private int value;

    public CProduct ()
    {
        name = "empty";
        value = 0;
    }

    public CProduct (String name, int value)
    {
        this.name = name;
        this.value = value;
    }

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getValue() {
        return value;
    }
    public void setValue(int value) {
        this.value = value;
    }
}

Rules:

rule "Case A"
salience 1
activation-group "g1"
    when
        p : CProduct( name == "A" )
    then
        System.out.println("Special product: " + p.getName());
end

rule "Case B"
salience 1
activation-group "g1"
    when
        p : CProduct( name == "B" )
    then
        System.out.println("Special product: " + p.getName());
end

rule "Case general"
salience 0
activation-group "g1"
    when
        p : CProduct( )
    then
        System.out.println("Normal product: " + p.getName());
end

Using stateLessSession, salience, and activation-group I can determine, that only one rule is going to be fired for each CProduct. And with salience param, I can determine priority (it is important to get special products first).
Now I am going to write those rules in spreadsheet. But I can't define rule "Case general".

	CONDITION	ACTION	ACTIVATION-GROUP	PRIORITY
	p:CProduct
	name	System.out.println("$param");
Rules names	Product name	what to print
Case A	A	Special A	G1	1
Case B	B	Special B	G1	1
General case		normal	G1	0

But when I am going to use the spreadsheet, I get this error:

"p cannot be resolved"

Problem disappears, when I fill "Product name" in "General case".

But I want it to be empty, because I want to fire rule "General case" when rules "Case A" & "Case B" won't fire for any object's name.

Thanks, Tom.