# Documentation of test_file

Global Index (all files) (short | long) | Local Index (files in subdir) (short | long)

## Function Synopsis

    test_file(path_to_file)

## Help text

     Purpose: test the existence of a file and generate an error if it doesn't
     exist

     Variables:
    	- path_to_file: string of the full path of the file to test

     Global variables: none

## Cross-Reference Information

| This function is called by
--- | ---
| current_figure grid_current_plot gui_current gui_grid_current gui_stick_plot heading_figure recal_figure ref_speed_figure stick_plot_figure track_figure

Pierre-Michel THEVENY <theveny@dt.insu.cnrs.fr>