Simulink Issue with Visual Studio 2022 and Intel oneAPI 2025.1 (IFX)

[arthursfs]

Dear all,

This is a compilation of some notes and issues during the installation of Openfast.
The guide that I'm working with is this.

I'm using:

• Windows 11
• Visual Studio Community 2022 (LTSC 17.12)
• Intel Fortran (2025.1.0.602)
• Git

Also, the following is considered:

• The compatibility issues between Visual Studio and Intel Fortran are taken into account (as noted by Bonnie Jonkman in issue #1133)
• The release/debug configuration follows:

So, the notes:

First, one note on the prerequisites. The Intel Fortran Compiler should be downloaded either as part of the toolkit or a stand-alone version with the oneAPI Math Kernel Library. The stand-alone version alone will result in an error in the build step (step 7 of the guide).

Second, after the build is complete, the top of the create_FAST_SFunc.m file reads as follows

% - The 'includeDir' variable must specify the directory that contains the following header files:
% "FAST_Library.h", "OpenFOAM_Types.h", "SuperController_Types.h", and "ExtLoadsDX_Types.h"

Actually, the "SuperController_Types.h", and "ExtLoadsDX_Types.h" directories are defined in the lines that follow:

'-I../../../modules/supercontroller/src', ... % needed for visual studio builds to find "SuperController_Types.h"
'-I../../../modules/extloads/src', ... % needed for visual studio builds to find "ExtLoadsDX_Types.h"

And there is no path defined for the header "OpenFOAM_Types.h".

[arthursfs]

Now, in relation to the bug itself. My problem is that when I define a S_function in Simulink, the parameter S-func name defined as FAST_Sfunc does not work. Simulink tells me: Error:Error in S-function 'untitled/S-Function': S-Function 'FAST_Sfunc' does not exist

[andrew-platt]

Which OpenFAST version are you using?

[arthursfs]

Hi, I am using the last one, obtained with git clone

[andrew-platt]

I assume then that you are using the main branch. When did you clone it?

[arthursfs]

openfast /h returns the following:

OpenFAST-v4.0.3-dirty
Compile Info:

• Compiler: Intel(R) Fortran Compiler 20250100
• Architecture: 64 bit
• Precision: single
• OpenMP: No
• Date: Apr 18 2025
• Time: 17:11:59
  Execution Info:
• Date: 04/18/2025
• Time: 18:50:17+0100

I cloned it a week ago.

[andrew-platt]

I'm not sure how soon I can get to debugging this (I don't have a good windows setup to try it on at the moment).

[arthursfs]

Hi,

I can give more information if needed

[bjonkman]

Generally, if Simulink is telling you an S-Function doesn't exist, I would check that the Matlab path (or current directory) is set properly so that it can find the file it's looking for. In your case, it needs to find FAST_SFunc.mexw64.

[arthursfs]

Hi,

Sorry, I am having a different error now that I restarted the system. I think now this issue has some similarities with mine. I will reproduce the steps, to see if it sheds some light on my problem

First, I am executing create_FAST_SFunc.m. The output is the following message:

and thus, the folder content is:

Now, when configuring the S-function

The following error appears:

[bjonkman]

That error indicates that the S-Function cannot find all of its dependent DLLs. FAST_SFunc.mexw64 depends on OpenFAST-Simulink_x64.dll, so that DLL will also need to be on the Matlab path.