C Caller with Multidimensional Signals in Simulink

How to deal with multidimensional data inputing the C caller function?

How the argument of the C-function looks like where inutting vector of 3-elements ?

double myTEST(double *u){}

Error:Error in port widths or dimensions. 'Output Port 1' of 'Vec3' is a one dimensional vector with 3 elements.

Error in port widths or dimensions. 'Input Port 1' of 'myTEST' is a one dimensional vector with 1 elements.

Answer 1

[Umang Pandey]

Hi Jack,

I recommend checking out the following MATLAB blog post titled "How to Correct Errors in Port Width or Dimension in Simulink," which specifically addresses the error you're encountering. It provides various debugging approaches and solutions:

https://blogs.mathworks.com/simulink/2024/09/19/how-to-correct-errors-in-port-width-or-dimension-in-simulink/

Additionally, the following MATLAB answers might also be of help:

https://www.mathworks.com/matlabcentral/answers/405908-how-to-correct-error-in-port-width-or-dimension-in-simulink

https://in.mathworks.com/matlabcentral/answers/248904-error-in-port-widths-or-dimensions

Best,

Umang

Answer 2

[David Balbuena]

You need to specify the dimension is "3" on the C Caller block: