how to clear temporary memory of workers in Parallel computing

HI

how to clear temporary memory of workers in Parallel computing?

I have a parallel code given below

=============================

%Function File

function [PD PD123] = demo(PL)

if labindex==1

PD=125;

end

if labindex==2

PD=150;

end

if labindex==3

PD=175;

end

if labindex==4

PD=200;

end

PD123=PD+PL;

end

========================

=================================

% Main File

clear all

clc

PL=50;

jm=findResource('scheduler','configuration','jobmanagerconfig1')

pjob1=createParallelJob(jm,'configuration','jobmanagerconfig1')

set(pjob1,'Configuration','jobmanagerconfig1')

set(pjob1,'MinimumNumberOfWorkers',4);

set(pjob1,'MaximumNumberOfWorkers',4);

set(pjob1,'FileDependencies',{'demo.m'})

task1=createTask(pjob1,@demo,2,{PL})

submit(pjob1)

results=getAllOutputArguments(pjob1)

destroy(pjob1)

=================================

output i got like

=============================== results=

[125] [175]

[150] [200]

[175] [225]

[200] [250]

=============================

My question is ,

For the second time run, If I change "PL=100"

Then i got the same results.

I was think that may be PL is stored in temporary memory and it is not cleared during the second time run.

Will you suggest me some commands in parallel computing , so that the variable must be cleared if we want to run the same code for second or third times.