Here is something else I came up with after reading the docs you wrote: 

my $title = "something";
#title of the input file
my $executable = "C:/Users/Desktop/file.exe";
# the .exe file where the input needs to be passed
my $output = "C:/Users/Desktop";
# folder where the generated output files need to be located
my $outfile = "C:/Users/Desktop/$title.in";
#location of the input file
    open(OUTFILE,">$outfile") or die "Can't open output file $outfile\
+n";
    print OUTFILE @array;
    close OUTFILE;

    my $msg = $mw->messageBox(-icon => "info", -type => "OK",
                              -title => 'Save', -message => "File was 
+successfully saved.");


 my @args = ("start",$executable,$title);
for (@args) {
  # Apply smart-ish double quotes
  if (/ /) { $_ = qq{"$_"}; }
};
 chdir $output;
#this command isn't working on Tk
system(@args) == 0
  or warn "Couldn't launch '$title' : $!/$?/$^E";

[download]
This also works fine in perl but not in Tk. I think the problem here is that it doesn't locate the $output directory. I know that you chdir does nothing if the directory is not set properly. Is there another way of specifying the directory?

In reply to Re^3: Tk - system() by lil_v
in thread Tk - system() by lil_v

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