Does not work in CodeIgniter 3.1.2

[ilzat]

Hello, i am using CodeIgniter v 3.1.2 with HMVC,
Have error:
A PHP Error was encountered
Severity: Notice
Message: Undefined property: DatatableControl::$db
Filename: libraries/Datatable.php
Line Number: 140
Backtrace:
File: C:\OpenServer\domains\sa\application\libraries\Datatable.php
Line: 140
Function: _error_handler
File: C:\OpenServer\domains\sa\application\controllers\DatatableControl.php
Line: 16
Function: datatableJson
File: C:\OpenServer\domains\sa\public\index.php
Line: 317
Function: require_once

but autoload has:
$autoload['libraries'] = array('database');

[leandroruel]

no? sad... i'm using 3.x

[89gsc]

Weird I am using 3.1.4 I was on just version 3 but upgraded to 3.14 just now and mine still works.