How to avoid variable declaration dublication in a script?

Question

Hello to everyone!
I have a business rule which calls twice same script. But in this sript there is a variable declaration (MethodOpl).
Rule:
FIX (&CashFlowPlanningMonths, &PlanningYear, {SelScenario}, {SelVersion})
    %Script(name:="Distribution 100",application:="workapp3",plantype:="Plan1");
ENDFIX;
FIX (Jan:Dec, &NextYear, {SelScenario}, {SelVersion})
    %Script(name:="Distribution 100",application:="workapp3",plantype:="Plan1");
ENDFIX;
Script:
VAR MethodOpl = 0;
FIX (@DESCENDANTS("TotalLocations"), "NoAnalytics", @DESCENDANTS("100000"))
  AmountByPay(
      IF ( NOT @ISMBR(@LIST("114100","115110","115120","115130")) )
        MethodOpl = "BegBalance"->WorkVersion->"NoFRC"->"DistributionByPay";
        IF ( MethodOpl == #Missing )
           MethodOpl = "NoLocation"->WorkVersion->"BegBalance"->"NoFRC"->"DistributionByPay";
        ENDIF;
        ... (some calculations)
      ENDIF;
ENDFIX;
If I try to validate rule I get error like this:
An error occurred in: Rule:workapp3.Plan1.TestOTN
A validation error was received from the Planning server 'http://ohp:80/HyperionPlanning/servlet/HspAppManagerServlet?appname=workapp3'.
'Error:Переопределение имени переменной [MethodOpl]. Rule workapp3.Plan1.TestOTN'.
Error text can be translated as "Error: Redeclaring variable name [MethodOpl]"
Can you advice me how to avoid second declaration?
May be somehow like this?
#IF !DEFINED(MethodOpl)
  VAR MethodOpl;
#ENDIF
MethodOpl = 0;

Answer 1

Try creating a separate script for variable declaration & declare all the variables inside it.Add this script as first statement in the rule
SCRIPT:  "Var Declaration"
VAR MethodOpl = 0;
RULE
%Script(name:="Var Declaration",application:="workapp3",plantype:="Plan1");
FIX (&CashFlowPlanningMonths, &PlanningYear, {SelScenario}, {SelVersion})
%Script(name:="Distribution 100",application:="workapp3",plantype:="Plan1");
ENDFIX;
FIX (Jan:Dec, &NextYear, {SelScenario}, {SelVersion})
%Script(name:="Distribution 100",application:="workapp3",plantype:="Plan1");
ENDFIX;
remove the "MethodOpl" variable declaration from the script -"Distribution 100".