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Simulink Compiler Limitations

Rapid Accelerator Mode

The rapid accelerator mode creates a Rapid Accelerator standalone executable from your model. This executable includes the solver and model methods, but it resides outside of MATLAB® and Simulink®. It uses external mode to communicate with Simulink.

MATLAB and Simulink run in one process, and if a second processing core is available, the standalone executable runs there.


  • Rapid Accelerator mode does not support:

    • Algebraic loops.

    • Targets written in C++.

    • Interpreted MATLAB Function blocks.

    • Noninlined MATLAB language or Fortran S-functions. You must write S-functions in C or inline them using the Target Language Compiler (TLC) or you can also use the MEX file.

    • Debugger or Profiler.

    • Run time objects for Simulink.RunTimeBlock and Simulink.BlockCompOutputPortData blocks.

  • Model parameters must be one of these data types:

    • boolean

    • uint8 or int8

    • uint16 or int16

    • uint32 or int32

    • single or double

    • Fixed-point

    • Enumerated

  • You cannot pause a simulation in Rapid Accelerator mode.

  • In certain cases, changing block parameters can result in structural changes to your model that change the model checksum. An example of such a change is changing the number of delays in a DSP simulation. In these cases, you must regenerate the code for the model. See Code Regeneration in Accelerated Models for more information.

  • For root inports, Rapid Accelerator mode supports only base as the Srcworkspace.

  • For root inports, when you specify the minimum and maximum values that the block should output, Rapid Accelerator mode does not recognize these limits during simulation.

  • In Rapid Accelerator mode, To File or To Workspace blocks inside function-call subsystems do not generate any logging files if the function-call port is connected to Ground or unconnected.

  • Simulink Compiler™ does not support the use of Scope block and non-virtual bus.

  • Simulink Compiler does not support lcc-win64.

  • Simulink Compiler does not support initialize, terminate, and reset blocks on referenced models.

  • Save final states: String data types, Bus data types, Half precision and fix point data types are not supported for 'Saving final states'. When there is an unsupported data type state to be logged, no final-states are logged.

  • Load initial states: String data types, Bus data types, half precision, fix point data types are not supported for loading. When there is an unsupported data type, simulation stops with error.

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