Unable to export S-Function model to FMU with release 2.8

[benplay2]

I was able to export S-Function Simulink models to FMU using release 2.7, but I am no longer able to with 2.8.

Environment details:

• Operating system: Windows 10 64bit
• MATLAB 2016b 64bit
• For 2.8, I am using cmake as installed by grtfmi_install_cmake. (cmake-3.15.2-win64-x64.zip)

I have been able to reproduce the issue generically with a few simple steps:
(Follow these instructions for both versions 2.7 and 2.8)

1. Copy required files to a working directory

copyfile(which('sfcndemo_sfun_atol'), pwd);
copyfile(which('sfun_atol.mexw64'), pwd);

2. Initialize FMIKit
   FMIKit.initialize
3. Open the model and update build settings

• open_system('sfcndemo_sfun_atol.slx')
• Edit model configuration parameters:
  • Solver:
    • Change solver to fixed-step
  • Code Generation:
    • System target file: rtwsfcnfmi.tlc
    • FMI
      • FMI Type: CoSimulation
      • Load S-Functions from binary MEX files: YES
  • Apply and ok

4. Build the model
   • 2.7 succeeds, but 2.8 fails

Here's the main error message:

Creating library C:/testFMUExport/matlabSfunction2.8/sfcndemo_sfun_atol_sfcn_rtw_fmi/Release/sfcndemo_sfun_atol.lib and object C:/testFMUExport/matlabSfunction2.8/sfcndemo_sfun_atol_sfcn_rtw_fmi/Release/sfcndemo_sfun_atol.exp
sfcn_fmi.obj : error LNK2019: unresolved external symbol sfun_atol referenced in function sfcndemo_sfun_atol_malloc [C:\testFMUExport\matlabSfunction2.8\sfcndemo_sfun_atol_sfcn_rtw_fmi\sfcndemo_sfun_atol.vcxproj]
C:\testFMUExport\matlabSfunction2.8\sfcndemo_sfun_atol_sfcn_rtw_fmi\Release\sfcndemo_sfun_atol.dll : fatal error LNK1120: 1 unresolved externals [C:\testFMUExport\matlabSfunction2.8\sfcndemo_sfun_atol_sfcn_rtw_fmi\sfcndemo_sfun_atol.vcxproj]

[t-sommer]

@benplay2, can you give f0e7963 a try?

[krishnashukla201]

I got a new issue when trying to export simple model through s-function target for Model Exchange.
I simply create a new enum type BOOL_TYPE and some other typedef to use in my model. So during creation of model_interface.c file it create 2 time case with same value 8 and create 3 time case with value 0.

size_t getCGTypeSize(int typeIndex)
{
switch (typeIndex) {
case 0:
return 8; /* real_T */

case 1:
return 4; /* real32_T */

case 2:
return 1; /* int8_T */

case 3:
return 1; /* uint8_T */

case 4:
return 2; /* int16_T */

case 5:
return 2; /* uint16_T */

case 6:
return 4; /* int32_T */

case 7:
return 4; /* uint32_T */

case 8:
return 1; /* boolean_T */

case 9:
return 0; /* fcn_call_T */

case 10:
return 4; /* int_T */

case 11:
return 8; /* pointer_T */

case 12:
return 8; /* action_T */

case 13:
return 8; /* timer_uint32_pair_T */

case 8:
return 1; /* BOOL_TYPE */

case 0:
return 8; /* TemperatureType */

case 0:
return 8; /* Q16_15_TYPE */

default:
return 0; /* unknown type */
}
}

Error given in Matlab is

model_interface.c
D:\Manmohan\REF\Ref_V6\work\test_func_sfcn_rtw_fmi\model_interface.c(49): error C2196: case value '8' already used [D:\Manmohan\REF\Ref_V6\work\test_func_sfcn_rtw_fmi\test_func.vcxproj]
D:\Manmohan\REF\Ref_V6\work\test_func_sfcn_rtw_fmi\model_interface.c(52): error C2196: case value '0' already used [D:\Manmohan\REF\Ref_V6\work\test_func_sfcn_rtw_fmi\test_func.vcxproj]
D:\Manmohan\REF\Ref_V6\work\test_func_sfcn_rtw_fmi\model_interface.c(55): error C2196: case value '0' already used [D:\Manmohan\REF\Ref_V6\work\test_func_sfcn_rtw_fmi\test_func.vcxproj].

please let me know the solution.

[t-sommer]

I simply create a new enum type BOOL_TYPE and some other typedef to use in my model. So during creation of model_interface.c file it create 2 time case with same value 8 and create 3 time case with value 0.

@krishnashukla201, this problem seems unrelated to #203. Please open a new issue and provide steps to reproduce it.

[benplay2]

Yes @t-sommer, f0e7963 fixed the issue. Thanks for the quick work!