Undefined offset: sef_incl.php

How can I remove this notice from PHP?  This appears in the log and my server administrator is concern... since sef_incl.php is encoded, I have no way of knowing what may be happening.

Here is the error...

Undefined offset:  1 in /var/www/html/joomla/components/com_sef/sef_incl.php on line 0, refer
er: http://www.

---

.com

I did update using one suggestion on your website to run
"ALTER TABLE jos_sef_config ADD `com_exception` text NOT NULL default '' AFTER `url_exception`;"

Please guide me to what I need to do to eliminate this error?

Uninstall completely and install SEF Advance again.
If this notice is related to some 3rd party component then it can't be supported by me.