I am using the following script to run an external program: 
use IPC::Open2;

my $infile = shift;
open (INFILE, "<$infile");
my $output;
my $input;
{
    local $/ = undef;
    $input = <INFILE>;
}

my $pid = open2(*README, *WRITEME, 'progam.exe');
print WRITEME "$input";

{
    local $/ = undef;
    $output = <README>;
}

close(README);
close(WRITEME);
waitpid($pid, 0);

print "$output";

[download]
When I start the script it starts the program and, but does not output anything. Only when I kill the process of the external program through the windows task manager, the (correct) output is printed to the screen. Do I somehow have to end the process in the script? When I run the program just from the command line with input on standard input, it prints it's results and exits.

In reply to IPC:Open2 question by lynx

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