simulink output in a parfor loop

Hi all,

I'm running a model and need to sweep through a lot of parameters so I am using the parallel computing toolbox. I usually use the following type of code and then run a separate function with a normal loop to post process the output file (logsout in this case).

logsout(numsim)     = Simulink.SimulationOutput;
parfor jj = 1:numsim
    load_system(model);
    [kk,ll,mm] = ind2sub(simSpace,jj);
    set_param([model '/BA_dynamic/Pitch_dynamic/Mwave'], 'VariableName', mat2str([Force{mm}.Time' Force{mm}.Pitch']));
    set_param([model '/PTO_force/Constant1'], 'Value', num2str(PTO.stiffness(ll)));
    set_param([model '/PTO_force/Constant3'], 'Value', num2str(PTO.Damper(kk)));
    logsout(jj) = sim(model,'ReturnWorkspaceOutputs', 'on');
end

My issue is that I now need to run the simulation for a very large number of parameters so the output file became massive and I run out of memory when trying to post process it. What I then try to do is to get each worker to do the post processing. I have tried the following code:

parfor jj = 1:numsim
    load_system(model);
    [kk,ll,mm] = ind2sub(simSpace,jj);
    set_param([model '/BA_dynamic/Pitch_dynamic/Mwave'], 'VariableName', mat2str([Force{mm}.Time' Force{mm}.Pitch']));
    set_param([model '/PTO_force/Constant1'], 'Value', num2str(PTO.stiffness(ll)));
    set_param([model '/PTO_force/Constant3'], 'Value', num2str(PTO.Damper(kk)));
    logsout = sim(model,'ReturnWorkspaceOutputs', 'on');
    addpath([name.folder,'\Post'])
    [data]=model_post_003(logsout);
    rmpath([name.folder,'\Post'])
    Power(jj) = data.PowervsTime(end,jj);

end

I get the following error message:

Error using model_post_003 (line 4)
Attempt to reference field of non-structure array.

Error in single_run_003 (line 101)
parfor jj = 1:numsim

I suspect this has something to do memory access issue from the workers but I find it hard to diagnose what is happening within the workers.

For information below is my post processing function but I don't think it is the cause of the error as it runs with no issues for a normal loop:

function [data]=model_post_003(logsout)

% simulink parameters
data.time            = logsout.get('Fdamp_x').Values.Time;
data.Fpto            = logsout.get('Force_PTO').Values.Data;
data.PTO_vel         = logsout.get('PTO_vel').Values.Data;

%average power .vs. time
InstPow = data.Fpto.*data.PTO_vel;  %PTO.Damper*(data.PTO_vel.*data.PTO_vel);  %
data.WorkvsTime  = cumtrapz(data.time,InstPow);
data.PowervsTime = data.WorkvsTime(2:end)./data.time(2:end);

Thanks in advance for your help.

Alex