Concurrent execution in Simulink real-time

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Sam Chakour 2016-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/314779-concurrent-execution-in-simulink-real-time

I have two model references - Slow model and Fast model, each running at its own rate for concurrent execution on the grt "generic real time" . However when I attempt to build the block I get the following error:

    Simulink cannot generate code for the signal at output port 1 of block 'Multirate/Fast' because the signal requires data transfer that generates lock-free code for a rate monotonically scheduled task.

I am not sure what to configure in simulink to overcome this error. I attempted to add rate transition from the Fast model to the Slow model but the error remains.

Any thoughts