织梦cms更新列表页提示Fatal error: Call to a member function Get

Fatal error: Call to a member function GetInnerText() on a non-object in E:\www\include\taglib\channel\img.lib.php on line 51

$innerTmp = ($arcTag=="") ? trim($arcTag) : trim($arcTag->GetInnerText());

<?php  
if(!defined('DEDEINC'))  
{  
exit( "Request Error!");  
}  
/**  
* 图像标签   
*   
* @version $Id:img.lib.php 1 9:33 2010年7月8日Z tianya $   
* @package DedeCMS.Taglib   
* @copyright Copyright (c) 2007 - 2010, DesDev, Inc.   
* @license http://help.dedecms.com/usersguide/license.html  
* @link http://www.dedecms.com  
*/   
 
function ch_img($fvalue,&$arcTag,&$refObj,$fname='')  
{  
global $cfg_album_width,$cfg_album_row,$cfg_album_col,$cfg_album_pagesize,$cfg_album_style,$cfg_album_ddwidth,$cfg_basehost,$cfg_multi_site;   
$dtp = new DedeTagParse();   
$dtp- >LoadSource($fvalue);  
if(!is_array($dtp- >CTags))  
{   
$dtp- >Clear();  
return "无图片信息！";  
}   
$pagestyle = $cfg_album_style;   
$maxwidth = $cfg_album_width;   
$ddmaxwidth = $cfg_album_ddwidth;   
$pagepicnum = $cfg_album_pagesize;   
$row = $cfg_album_row;   
$icol = $cfg_album_col;   
$ptag = $dtp- >GetTag('pagestyle');  
if(is_object($ptag))   
{   
$pagestyle = $ptag- >GetAtt('value');  
$maxwidth = $ptag- >GetAtt('maxwidth');  
$ddmaxwidth = $ptag- >GetAtt('ddmaxwidth');  
$pagepicnum = $ptag- >GetAtt('pagepicnum');  
$irow = $ptag- >GetAtt('row');  
$icol = $ptag- >GetAtt('col');  
if(emptyempty($maxwidth))   
{   
$maxwidth = $cfg_album_width;   
}   
}   
 
//遍历图片信息  
$mrow = 0;  
$mcol = 0;   
$images = array();   
$innerTmp = $arcTag- >GetInnerText();  
if(trim($innerTmp)=='')   
{   
$innerTmp = GetSysTemplets( "channel_article_image.htm");  
}   
 
if($pagestyle==1)  
{  
$pagesize = $pagepicnum;   
}   
else if($pagestyle==2)   
{   
$pagesize = 1;   
}   
else   
{   
$pagesize = $irow * $icol;   
}   
 
if(is_object($arcTag) && $arcTag->GetAtt('pagesize') > 0)  
{  
$pagesize = $arcTag- >GetAtt('pagesize');  
}   
if(emptyempty($pagesize))   
{   
$pagesize = 12;   
}   
$aid = $refObj- >ArcID;  
$row = $refObj- >dsql->GetOne("SELECT title FROM `ddmx_archives` WHERE `id` = '$aid';");  
$title = $row['title'];   
$revalue = '';   
$GLOBAL['photoid'] = 0;   
foreach($dtp- >CTags as $ctag)  
{   
if($ctag- >GetName()=="img")  
{   
$fields = $ctag- >CAttribute->Items;  
$fields['text'] = str_replace( "'","",$ctag->GetAtt('text'));  
$fields['title'] = $title;   
$fields['imgsrc'] = trim($ctag- >GetInnerText());  
$fields['imgsrctrue'] = $fields['imgsrc'];   
if(emptyempty($fields['ddimg']))   
{   
$fields['ddimg'] = $fields['imgsrc'];   
}   
if($cfg_multi_site=='Y')   
{   
//$cfg_basehost)   
if( !preg_match('#^http:#i', $fields['imgsrc']) ) {   
$fields['imgsrc'] = $cfg_basehost.$fields['imgsrc'];   
}   
if( !preg_match('#^http:#i', $fields['ddimg']) ) {   
$fields['ddimg'] = $cfg_basehost.$fields['ddimg'];   
}   
}   
if(emptyempty($fields['width']))   
{   
$fields['width'] = $maxwidth;   
}   
//if($fields['text']=='')   
//{   
//$fields['text'] = '图片'.($GLOBAL['photoid']+1);   
/