file problem

From: King of Red Lions (bob_at_bob.com)
Date: 04/29/04 

Date: 28 Apr 2004 22:40:13 GMT

What does the following mean?

Warning: unlink(posts/posts'1'.txt): No such file or directory in
/usr/local/psa/home/vhosts/paradisa.net/httpdocs/update/postprocess.php on
line 9

Warning: fopen(posts/post7.txt): failed to open stream: Permission denied
in /usr/local/psa/home/vhosts/paradisa.net/httpdocs/update/postprocess.php
on line 11

Warning: fopen(counter.txt): failed to open stream: Permission denied in
/usr/local/psa/home/vhosts/paradisa.net/httpdocs/update/postprocess.php on
line 19

Many thanks in advance!