Thank you for pointing out. Please do the following modification:
1: rename file effective_mode_area.lsf to be effective_mode_area_function.lsf;
2: open mode_area_step4.lsf ;
2: modify the function name from " mode_area_SiN_updated" to effective_mode_area_function. eg
#mode_area_SiN_updated;
effective_mode_area_function;
