Real time kernel Error. S-function error.

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:

• Error reported by S-function 'sldrtsync' in 'sldrtex_vdp/Real-Time Synchronization': Hardware timer cannot be allocated. Real-time kernel cannot run.

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!

[PRATIK KORE]

Hi Christopher, I am facing same issue. Could you please post if you get any soluaiton for this issue.

[Erdi Gülbahçe]

I am having the same problem. Please have a solution.

[Daria Nikitaeva]

I am also having this issue

[Sabine Lützeler]

Hi,

we solved the problem with de- and reinstalling the realtime kernel. Occurs after an Windows update...

hope that helps

greetings Sabine

[Nazmi Rosly]

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]

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.

Answer 1

[Jan Houska]

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

[Oren Savir]

hello, i have the same problem, but i cant find the solution.

i checked the device manager and the HPET is installed with the latest driver version.

any ideas what else i can do ?

thanks in advance.

[Jan Houska]

Hi Oren,

please try the latest MATLAB version if you haven't already. The compatibility with latest OS versions is being improved and maintained, and the diagnostics as well. If you still have problems, please post your MATLAB version and the exact version of your operating system. Or contact MathWorks technical support.

Jan

[Priyabrata]

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]

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

[Jizheng]

Hi Jan

I have checked HPET and Hyper-V. They are all enabled. However, I am still facing the error :"Hardware timer cannot be allocated. Real-time kernel cannot run."

MATLAB Version: R2023a Update 2(9.14.0.2254940) Academic Use

Operating System: Windows 11 24H2 Family Version

Thanks in advance!

[Jan Houska]

Hi Jizheng,

please update to the latest R2023a Update 8, then reinstall the kernel using sldrtkernel -setup. The update contains some compatibility improvements with Windows 11 and has a good chance to help.

Good Luck, Jan

[Jizheng]

Hi Jan

That works！Thanks a lot！

Jizheng