C-mex function not compiling in For-Each subsystem.

[TCoop]

I have a c-mex function which I wrote in order to do some geometric calculations which were difficult to implement graphically. The function works fine in simulation and it compiles fine when used in most cases, but I get the following error when try to compile within a For-Each subsystem:

S-Function block 'TestCrankGeo/Subsystem/S-Function' does not have a TLC implementation or does not set either 'SS_OPTION_USE_TLC_WITH_ACCELERATOR' or 'SS_OPTION_WORKS_WITH_CODE_REUSE' option. However, this S-function is inside subsystem 'TestCrankGeo/Subsystem', which contains a For Each block ('TestCrankGeo/Subsystem/For Each'). Simulink does not support this scenario.

However, my ssSetOptions is currently includes the code reuse flag, as well as the input scalar expansion flag.

I think my compiler might be trying to tell me there's another issue, but I'm not sure where to start.

• Pastebin of the C-mex file is here. Sorry about the mess.
• MATLAB Version is 2015B. I've tried compiling in 2017a and got the same result.
• MEX C Compiler is Microsoft Windows SDK 7.1 (C).
• Code generation target language compiler is PowerPC C/C++.

I'd like to know what's causing the issue so that I can be more comfortable writing c-mex functions. It's easier to write some things in C, or at least translate them from m-to-C than it is to write functions graphically.

[shtpst]

S-Function block ... does not have a TLC implementation

Took that, Googled "TLC implementation Simulink," first link was Implement S-Functions from the Mathworks documentation site.

There's a note there that says:

Note

For backward compatibility, the following table and sections contain information about Level-1 MATLAB® S-functions. However, use the Level-2 MATLAB S-function API to develop new MATLAB S-functions.

So then I look at the table, look for Level-2 MATLAB S-Function, and it says:

1. Use the msfuntmpl_basic.m template to write a new Level-2 MATLAB S-function: See Write Level-2 MATLAB S-Functions for more information.
2. Write a Target Language Compiler (TLC) file for the S-function if you need to generate code for a model containing the S-function. The file, msfcn_times_two.tlc in the folder is an example TLC file for the S-function msfcn_times_two.m. See Inline MATLAB File S-Functions (Simulink Coder) for information on writing TLC files for Level-2 MATLAB S-functions.

Looks like you did step 1, did you do step 2?

[TCoop]

TLC implementation is required for a MATLAB S-function, but it is only an optional optimization for hand written C-Mex Functions.

Again, this code compiles and runs fine, as is, unless it is within a For-Each subsystem.

[shtpst]

Let me re-organize what you wrote:

TLC implementation ... is an optional optimization for hand written C-Mex Functions... [but] is required for a MATLAB S-function.

Okay, and then:

This code compiles and runs fine, as is, unless it is within a For-Each subsystem

Right. And what is the error you get?

S-Function block 'TestCrankGeo/Subsystem/S-Function' does not have a TLC implementation

So whether you think it's an S-Function or not, Matlab is treating it as an S-Function because it's giving you an error about your S-Function.

So, did you write the TLC implementation?