This is My rule

rule "Area_SquareFt_01_10-01-09_12-31-14"
date-effective "01-Oct-2009" date-expires "31-Dec-2014"  salience 6
 no-loop true
  when
 eval(BusinessLogic.gettest("Inside Area_SquareFt_01_10-01-09_12-31-14 executed"))
 objectP2483 : Para_2483( (fid2335=="Block") && (fid2336=="16") );
 
 then
 System.out.println("Area_SquareFt_01_10-01-09_12-31-14 executed");
 objectP2483.setFid31003(new Double(497)); end

 here My 31003 is a String  field   but i am assigning a Double in it  so that should'nt
 work . But  the problem is because of this my all remmaning rules also stoped working.
And it took 2 hours to detect it because the execute() method dosent through any error.
So how can we detect these situation earlier ,so as to catch the problem early and why my the remm
rules stoped woking because on this.