How to import DLL files (*.dll ) into Simulink?

I got several DLL files from Vendor, I wanna import these files into my Simulink model and generate some function blocks. I am using Matlab R2023a/Simulink. I tried add S-Function blocks for each dll file, and entered DLL filename into 'S-function modules', then I ran the Simulink model but got the following error:

How to correctly import DLL files into Matlab R2023a/Simulink? Please advise. Thanks!

[madhan ravi]

https://www.mathworks.com/matlabcentral/answers/91975-how-can-i-use-a-dll-file-in-simulink#answer_101326 did it help?

[Linda]

Hi Madhan,

I created the S-function block into Simulink based on the link you shared. However as you can see, I got the error shown in my question description. Can you please tell if my settings for the S-function has anything wrong? Or is there any other steps missing besides setting up the S-function block? Can you please provide instructions with more details. Thank you!

Answer 1

[Tushar Sharma]

Hi Linda,

I understand that you created S-function block to acheive importing DLL files into Simulink, but you are facing an error.

It looks like you're encountering an error related to an S-function called "system1" within the "DLLtest1/S-Function". To resolve this issue, you may want to check the following:

1. Check S-Function Configuration: Ensure that the S-function "system1" is available within your project or environment.
2. Library or Path: Verify that the necessary library or path containing the "system1" S-function is correctly referenced and accessible to the project.
3. S-Function Name: Double-check that the S-function name "system1" is spelled correctly and matches the actual name of the S-function you intend to use.

By addressing these points, you may be able to resolve the error related to the non-existent S-function.

Hope it helps!

Best regards,

Tushar