MATLAB Answers

"S-Function does not exist" but is clearly in the Matlab path!

95 views (last 30 days)
Hello,
I am working with a huge simulink model that uses a lot of custom library blocks and S-functions.
But 3 of them dont work, the error is just: "Error in S-function 'modelname/subsystem/block': S-Function 'sfun_name' does not exist"
But I have a folder in my model library with the files name.cpp, name.h, sfun_name.cpp and also the simulink model of the library block.
This folder is definetely added to the path, I checked with the path command
It used to work but now simulink says these S-functions do not exist, but they do.
I tried to replace the blocks from the library but it did not help.
Does anyone have an idea about this? Or what else would I need to provide? (I am not allowed to upload any files from the model)
Thank you!

Accepted Answer

Mark McBroom
Mark McBroom on 4 Feb 2021
Do you have a file named sfun_name.mexw64? Simulink needs the s-function to be compiled into a mexw64( which is a specialzed DLL). If you don't have a .mexw64, then you will need to create one by compiling your C code into a mexw64 file with the "mex" command. https://www.mathworks.com/help/matlab/ref/mex.html?searchHighlight=mex&s_tid=srchtitle
mex sfun_name.cpp
  1 Comment
Peter Dauksch
Peter Dauksch on 8 Feb 2021
We actually found a mex32 file... (The model was created in a older version on a different computer)
But since it is now a 64 bit system this might be the issue!
Thank you!

Sign in to comment.

More Answers (0)

Products


Release

R2018a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!