hardware in the loop using tiva c and simulink

am trying to do hardware in the loop using Tiva c 123 with matlab 2018a but i got error when i try to build the model . I have embedded coder target and energia IDE, the error is

arm-none-eabi-g++: error: tiva: No such file or directory
arm-none-eabi-g++: error: c/energia-0101E0016/hardware/lm4f/cores/lm4f/lm4fcpp_blizzard.ld: No such file or directory
gmake: *** [../untitled.elf] Error 1
### Creating HTML report file untitled_codegen_rpt.html
### Build procedure for model: 'untitled' aborted due to an error.
Error:Error(s) encountered while building "untitled":
### Failed to generate all binary outputs.
Caused by:
Validation error(s):
MEX Tool: Cannot find file 'F:\\matlab2018files\\bin\\mex.exe'. The file does not exist.

[msh jgtu]

any help ,why did i get this error?

[Ganesh Bhagwat]

I don't know about " Tiva c 123 " but I think your .mex setup in not installed in the path