How to run ansys workbench through system() syntax?

Hi everyone, I have a code that runs the ansys workbench and then a journal file to do my study of a heat exchanger optimization.

As you can see, it starts ansys workbench at every loop and then does the calculations, which wastes a lot of time.

I would like to know if there is a way to start the software before the loop and then run the journal file every time which can save me a lot more time in my optimization process. the problem is at the third segment of the code below.

I really appreciate your time and help in advance.

Here is the code.

clc; clear;
London_CF = zeros(1,2);

for i=1:2
%% Changing the input parameters
% inputs of y = Amplitude*sin(2*pi*x/Length)
Length = [8 8];
Angle = [20 30];
Amplitude = [1 1];

% creating new journal file
fid  = fopen('BaseJournal.wbjn','r');
f = fread(fid,'*char')';
fclose(fid);
f = strrep(f,'Length' , num2str(Length(i)));
f = strrep(f,'Angle' , num2str(Angle(i)));
f = strrep(f,'Amplitude' , num2str(Amplitude(i)));
fid  = fopen('finalJournal.wbjn','w');
fprintf(fid,'%s',f);
fclose(fid);

%% Calculations in ansys with input parameters
system('C:\"Program Files"\"ANSYS Inc"\v212\Framework\bin\Win64\RunWB2.exe -X -R finalJournal.wbjn');

%% saving the output parameter
London_CF(i) = xlsread('export data.csv','export data','G8');
end