$trifilename

The Trifilename is the tri-element definition file output from the 2D-DDCC program. The definition can be found in *.tri. It also needs to goes with the $fetfilename

$trifilename
filename 

For examples:

$trifilename
Project_result.tri

The $trifilename setting in GUI interface is here
1. After Save and run ray tracing, we can press Input Editor, then press the Load and display an optional input file button below.
2. Choose a file named something like filename-ray.inp, and then we can view it here.

$fetfilename, $trifilename