The error is referring to "Just In Time" (commonly shortened to JIT) compilation. This is a process where code for a usually interpreted language (MATLAB in this case) is compiled to machine code on the client's machine, just before being run (hence "just in time"). Contrast this with "Ahead of Time" compilation, where the developer's machine does the compilation. Using a JIT compiler often improves performance of the code, and MATLAB code in SimEvent models is always JIT compiled. This error is generated because some MATLAB functions (including "rng") cannot be JIT compiled and so this model can't run.
A workaround is to make sure that all interactions with the random number generator (RNG) are executed outside of Simulink. This can be achieved using the "coder.extrinsic" function, with the following steps:
1. Replace the your call to:
rng('shuffle')
with:
coder.extrinsic("rng");
rng('shuffle');
On its own, this change will resolve the error but the Simulink model will still behave the same in every run. This is because the "rng" function is resetting the RNG inside MATLAB, whereas all other functions are using the RNG inside the Simulink model.
2. Add calls to "coder.extrinsic" for each place where random numbers are used in the Simulink model. For example, a line like
newValue = rand();
should be replaced with:
coder.extrinsic("rand");
newValue = rand();
Now, the call to "rand" will return different values in each run of the simulation.
