Autoload random error

I get the following error a couple of times a day. It happens randomly
and I can not figure out what exactly causes this error.

Does anyone have an idea what can cause this error?

System error

error:

RT::Attribute::Name Unimplemented in RT::Attributes.
(//var/www/localhost/rt-3.4.5/lib/RT/Attributes_Overlay.pm line 81)

context:

492:

else {

493:

my ( $package, $filename, $line );

494:

( $package, $filename, $line ) = caller;

495:

496:

die “$AUTOLOAD Unimplemented in $package. ($filename line $line) \n”;

497:

}

498:

499:

}

500:

code stack:

/usr/lib/perl5/vendor_perl/5.8.7/DBIx/SearchBuilder/Record.pm:496
/var/www/localhost/rt-3.4.5/lib/RT/Attributes_Overlay.pm:81
/var/www/localhost/rt-3.4.5/lib/RT/Attributes_Overlay.pm:73
/var/www/localhost/rt-3.4.5/lib/RT/Attributes_Overlay.pm:88
/var/www/localhost/rt-3.4.5/lib/RT/Attributes_Overlay.pm:119
/var/www/localhost/rt-3.4.5/local/html/Callbacks/UKCCallbacks/Elements/T
abs/Default:2
/var/www/localhost/htdocs/rt/Elements/Callback:83
/var/www/localhost/htdocs/rt/Elements/Tabs:101
/var/www/localhost/htdocs/rt/index.html:73
/var/www/localhost/htdocs/rt/autohandler:215

I get the following error a couple of times a day. It happens randomly
and I can not figure out what exactly causes this error.

Does anyone have an idea what can cause this error?

We never got it suitably tracked down, but I know that most folks saw
it go away when they upgraded to a newer searchbuilder or RT 3.6.

-j