$SIG{CHLD} = 'IGNORE';

    my $pid = fork();

    if ($pid) {
	# We're the child and we need to start the analysis

	# First we'll write out pid into a file in the run
	# folder so that the results tracker can tell if we've
	# died.

	open (PID,'>','pid.txt') or die "Failed to write to pid file : $!";

	print PID $pid;
	close PID or die "Failed to write to pid file: $!";

	exec("Rscript analysis.r > log.txt 2>errors.txt");

	exit(0);

    }

    print $q->redirect("script.cgi?job_id=$job_id");