open_file problems in ModelSIM

[hans1886]

ModelSIM, upon simulation of the code, complains that a text file I point too in my code does not exist.

file VLI_input_file: text open READ_MODE is "vli_input.txt";
begin
.
.
.
[red]>>[/red] file_open(VLI_input_file, "vli_input.txt");

This file resides in the same directory as the code.

Any ideas why? thx