I got the following exception when I tried to run the drl file rule.

org.drools.rule.InvalidRulePackage: unknown:13:37 mismatched token:
[@79,307:308='&&',<55>,13:37]; expecting type ')'
unknown:13:81 Unexpected token ')'

        at org.drools.rule.Package.checkValidity(Unknown Source)
        at org.drools.common.AbstractRuleBase.addPackage(Unknown Source)
        at com.sample.DroolsTest.main (DroolsTest.java:47)


Rule:

package com.policy;
#expander Ex1.dsl;
#list any import classes here.
#import java.util.HashMap;
import java.util.Iterator;
import com.examples.Student;
import com.examples.Module;
#declare any global variables here
global java.util.List errorlist;

rule "Ex1"
    when
        exists( $student : Student() && Module( student == $student, score <
40 ))
    then
        System.out.println("fierd");
end


Files:
Class 1:

package com.examples;


public class Student {
        private String name;
    private Object[] modules;
        public Object[] getModules() {
                return modules;
        }
        public void setModules(Object[] modules) {
                this.modules = modules;
        }
        public String getName() {
                return name;
        }
        public void setName(String name) {
                this.name = name;
        }

}




class 2:

package com.examples;

public class Module {
    private String name;
    private String studentName;
    private int score;

    public Module(String name, int score){
        this.setName(name);
         this.setScore(score);
    }


        public String getName() {
                return name;
        }
        public void setName(String name) {

                this.name = name;
        }
        public int getScore() {
                return score;
        }
        public void setScore(int score) {
                this.score = score;
        }
        public String getStudentName() {
                return studentName;
        }
        public void setStudentName(String studentName) {
                this.studentName = studentName;
        }
}


Anyone have any idea about it


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