How can I build a Simulink model that consists of S-function to '.sdf' file that can be supported by the dSpace Control Desk?

The user-defined block I use in the Simulink is the "S-function" block. It is linked to an ".m" file in the Matlab workspace. I had no issues running the files in the Simulink. However, as I click ctrl+B to build the control model file (.slx) in Simulink, I faced error as follows:

_ _ Error: File: C:\Program Files\MATLAB\R2013b\rtw\c\tlc\lib\utillib.tlc Line: 975 Column: 8 %exit directive: Simulink Coder Fatal in block: "NewMCL_Jo/MCL/VAD Control/Vivian MPC/MPC", block type "S-Function": MFile S-functions without a corresponding TLC file are not supported. You can inline your S-function (generic_mpc_multiobjective_LTV_HVAD) by creating a TLC file for it. You can also remap your S-function to C by creating a corresponding C Mex source file and a generic_mpc_multiobjective_LTV_HVAD.tlc file in the same directory as the MFile S-function which contains (on the first line): %% CallAsCMexLevel1 or %% CallAsCMexLevel2__

Can any of you help me to solve the issue?

Thanks.