pp -C and POSIX problems

I have just installed PAR .80 and am having problem when using a POSIX module. 
I have the following simple perl program to illustrate:

use POSIX qw(strftime);
$backup_file = "%m-%d-%y";
$backup_file = strftime( $backup_file, localtime);
printf("$backup_file\n");

When compiled using 'pp -o abc abc.pl' then it works just fine.

However, if I try to add in the --clean option the program hangs when run. I 
can successfully compile with 'pp --clean -p abc abc.pl' but when it runs it 
just hangs. No output at all. I can see that the /tmp/par-oracle directory gets 
created but nothing every happens.

Can anyone help??