Issue with Simulink Model Simulation inside Parfor ?

Hi,

I am trying to run multiple simulations with different data set on model 'ModelTest.slx' using parfor.

my code goes like this,

parfor
 simout=sim(bdroot,<options>)
 ..
 ..
 ..
end

Parfor executes one simulation (sometime it runs two simulations). It geerates 'slprj' folder after first simulation.

Then it gets aborted with following error message.

"C:\Users\...\parllelTest\slprj\_jitprj\jitEngineAccessInfo.mat.

Not a binary MAT-file. Try LOAD -ASCII to read as text."

Below are the details of matlab version and model settings,

Matalb 2015b,

parpool with local profile.

Simulation Mode : Normal;

Solver :Fixed Step, discrete

Does anyone have any idea about this error. ?

[Shivaputra Narke]

This issue exists only for model containing stateflow.

Answer 1

[Edric Ellis]

As @Sean says, parsim is the way to go if you can. However, as a workaround, you might get away with doing something like this:

parfor idx = ...
    oldFolder = cd(getAttachedFilesFolder());
    sim(..);
    cd(oldFolder);
end

This puts each worker into a unique working directory, which might well get around the problems with the Stateflow compilation results overwriting each other.

[Shivaputra Narke]

This is working with sending files to workers. I have few other questions on batch program, maybe I will start a different thread for that.

Thanks for the help!

[Edric Ellis]

Great, glad this is working. Yes, it's best to keep different questions separate.

Answer 2

[Sean de Wolski]

Have you looked at parsim? It's the new an improved means for simulating in parallel and takes care of the file management that was always a pain to do on your own.

[Shivaputra Narke]

parsim is not available in 2015b version, right ?