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Troubleshoot Slow or Halted Simulation on Windows

I see slow or halted simulation on my Windows® system. Simulation fails with an error message:

Warning: The "Real-Time Synchronization" block has timed out while
trying to synchronize to real-time kernel.

What This Issue Means

This message indicates that the system could not load and start the kernel.

Try This Workaround

To identify the cause of the issue, in the Command Window, type:


Examine the system information from these commands. Check whether the last line is:

Hyper-V Requirements:
   A hypervisor has been detected. Features required for Hyper-V will not be displayed. 

The Windows Hyper-V feature is not compatible with the Simulink® Desktop Real-Time™ kernel. You cannot use virtualization with the real-time kernel. To disable the Hyper-V feature:

  1. From the Start menu, search for Control Panel.

  2. In the Control Panel, select Programs and Features.

  3. Select Turn Windows features on or off.

  4. Clear the box for the Hyper-V feature.

    This operation begins the uninstall process. After it completes, you are prompted to restart the computer.

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