Simulink-Simiam

[GeralDennis319]

Hi, I currently use matlab 2019, I have problems with the files of simulink and I would like to know if anybody know how to fix this?

root_path =
'C:\Users\GERALDIN\Downloads\KSim-master\simulink..'
Error evaluating registered method 'Start' of MATLAB S-Function 'msfun_khepera3' in 'simiam_demo/Khepera III'. The following is the MATLAB call stack (file names and line numbers) that produced this error:
['C:\Users\GERALDIN\Downloads\Sim.I.am-master\simulink\msfun_khepera3.m'] [145]
Caused by:
Dot indexing is not supported for variables of this type.

Thanks