I am unsuccessfully trying to use post-expirator plugin.
My very-very many searches for why it is not working has shown me error log entries in my hosting company (cloudnext) admin panel which show ATA bringing about an error.

I do not know if the ATA error has anything to do with the plugin problem, but the error occurs when I put up a new post and select post expirator to either delete or change to draft at a future time.

Plugin Co is telling me "must be hosting co fault" & hosting Co are telling me; i'll let you guess !!

However I would welcome someone looking at the following errors and telling me if they mean anything of significance:- (the error messages stop when I change theme to TwentyTwelve)

Error Logs
[Sat Apr 06 12:30:43 2013] [error] [client 90.xxx.85.xxx] PHP Notice: Undefined index: bfa_ata_noncename in /home/sites/xxxsitename.co.uk/public_html/wp-content/themes/atahualpa/functions.php on line 665, referer: http://www.xxxsitename.co.uk/wp-admi...edit&message=6
[Sat Apr 06 12:31:14 2013] [error] [client client 90.xxx.85.xxx] PHP Notice: Undefined index: bfa_ata_noncename in /home/sites/xxxsitename.co.uk/public_html/wp-content/themes/atahualpa/functions.php on line 665, referer: http://www.floodproblems.co.uk/wp-admin/post-new.php

Access Logs
xxxsitename.co.uk client 90.xxx.85.xxx - - [06/Apr/2013:12:31:37 +0100] "GET / HTTP/1.1" 200 186037 "http://www.xxxsitename.co.uk/wp-admin/options-general.php?page=post-expirator.php" "Mozilla/5.0 (Windows NT 6.1; rv:19.0) Gecko/20100101 Firefox/19.0"

What version of Atahualpa and WP?

Drat
I forgot to add them

WP 3.5.1
ATA 3.7.10 upgrade to .11 soon

I just installed the plugin on my test site and had no issues when setting a post to expire.

when does the message show up? when you edit the post or when the post actually expires?
in wp-config.php, do you have

define('WP_DEBUG', true);

Originally Posted by juggledad

when does the message show up? when you edit the post or when the post actually expires?
in wp-config.php, do you have

define('WP_DEBUG', true);

Yes, close to end of script:

define('WP_DEBUG', true);
define('WP_DEBUG_DISPLAY', false);

Regarding "when does the message show up"
I don't get a message, the post just doesn't expire or change category (dependent on what I set the plugin to do)
The error message in my initial forum post is in my hosting admin panel

Well Done

But do you have any thoughts on the error log.