Problem when creating custom error page

[eluser]Unknown[/eluser]
Hi,
i am trying to modify my error_general.php file which is located at application/errors folder. I want to use my own template on the error page, so i tried to do something like this;

Code:

<?php $this->load->view('main/sol')?>
        <h1 class="pagetitle">&lt;?php echo $heading?&gt;</h1>
        <div class="column1">
            <div class="clean-gray">
            &lt;?php echo $message?&gt;
            </div>
        </div>
&lt;?php $this->load->view('main/sag')?&gt;

didnt work as i guess then i tried to get instance of CI like this;

Code:

<?php $CI =& get_instance();
    $CI->load->view('main/sol')?>
        <h1 class="pagetitle">&lt;?php echo $heading?&gt;</h1>
        <div class="column1">
            <div class="clean-gray">
            &lt;?php echo $message?&gt;
            </div>
        </div>
&lt;?php $CI->load->view('main/sag')?&gt;

But still, i am getting a PHP Error that says;

A PHP Error was encountered
Severity: Notice
Message: ob_end_clean() [ref.outcontrol]: failed to delete buffer. No buffer to delete.
Filename: libraries/Exceptions.php
Line Number: 129

any suggestions?

[eluser]Unknown[/eluser]
any suggestion would be appreciated