Real time kernel Error. S-function error.

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Christopher Schlüting
评论： Jan Houska 2024-2-27
Hello, i have a problem with the Real-Time features of MatLab.
I try to run some real time examples, but i always get an error message.
An error occurred while running the simulation and the simulation was terminated
Caused by:
I searched on google but did not really found something.
I am running Matlab 2019b for academic use on a Windoes 10 System.
Thanks in advance!
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Nazmi Rosly
Nazmi Rosly 2021-8-23
I also faced this problem. I have tried uninstall and install back the realtime kernel but it seems not to work
  • Error reported by S-function 'sldrtoo' in 'scope/ThingSpeak Output': Hardware timer cannot be allocated. Real-time kernel cannot run.
Walter Roberson
Walter Roberson 2021-8-23
Possibly that message could also be generated if the design required more hardware timers than existed for the device. It has been years since I saw the messages posted for that context, so I do not recall at the moment whether that case would generate this message or would generate a different more-specific message.

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Jan Houska
Jan Houska 2023-2-16
Hello,
the inability to allocate hardware timer for the real-time kernel is most often caused by hardware or software incompatibility between the real-time kernel and the operating system or the computer mainboard.
First, please try to use the latest available release of MATLAB and Simulink Desktop Real-Time, because compatibility between the real-time kernel and latest updates of operating systems is being constantly improved from release to release.
If you are already using the latest version of Simulink Desktop Real-Time and think that the reason is hardware incompatibility, please go to Device Manager and search the System Devices section for High Precision Event Timer (HPET). If the HPET device is not present, it may be disabled in BIOS settings and needs to be enabled there.
Jan
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Priyabrata
Priyabrata 2024-2-26
编辑：Priyabrata 2024-2-26
Hi Jan Housaka,
I am also facing similar issue as
Error:An error occurred while running the simulation and the simulation was terminated
Caused by:
Error reported by S-function 'sldrtpi' in 'filename/Packet Input':
Hardware timer cannot be allocated. Real-time kernel cannot run.
MATLAB Version: 23.2.0.2515942 (R2023b) Update 7
Operating System: Microsoft Windows 11 Enterprise Version 10.0
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
I have checked High Precision Event Timer and it is there. Simulink DesktopRealtime is also updated one.
Jan Houska
Jan Houska 2024-2-27
Hi Priyabrata,
for R2023b, please try to enable Hyper-V, the Microsoft hypervisor component, if you don't have it enabled already. This can solve the issue with not enough hardware timers available. Note - this recommendation is only valid for R2023a and later. Doing this for earlier versions will actually make things worse.
Good Luck, Jan

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