system.log so many problem. update.php,Autoload.php error

Question

so many have a problem... from the system.log what problem .. ? i'm try delete 'ves_pdfpro' but not a resolve. please an intelligible explanation

2016-01-29T03:19:24+00:00 ERR (3): Warning: include(VES/Core/Model/Observer.php): failed to open stream: No such file or directory  in /var/www/html/magento/lib/Varien/Autoload.php on line 94
2016-01-29T03:19:24+00:00 ERR (3): Warning: include(): Failed opening 'VES/Core/Model/Observer.php' for inclusion (include_path='/var/www/html/magento/app/code/local:/var/www/html/magento/app/code/community:/var/www/html/magento/app/code/core:/var/www/html/magento/lib:.:/usr/share/php:/usr/share/pear')  in /var/www/html/magento/lib/Varien/Autoload.php on line 94
2016-01-29T03:41:57+00:00 ERR (3): Warning: simplexml_load_string(): Entity: line 9: parser error : Extra content at the end of the document  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-01-29T03:41:57+00:00 ERR (3): Warning: simplexml_load_string(): <reference name="left">  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-01-29T03:41:57+00:00 ERR (3): Warning: simplexml_load_string(): ^  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-01-29T05:35:23+00:00 ERR (3): Warning: simplexml_load_string(): Entity: line 9: parser error : Extra content at the end of the document  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-01-29T05:35:23+00:00 ERR (3): Warning: simplexml_load_string(): <reference name="left">  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-01-29T05:35:23+00:00 ERR (3): Warning: simplexml_load_string(): ^  in /var/www/html/magento/app/code/core/Mage/Core/Model/Layout/Update.php on line 450
2016-01-30T14:30:00+00:00 ERR (3): Notice: Undefined offset: 1  in /var/www/html/magento/lib/Varien/Autoload.php on line 161

this is update.php 450 line

        // custom local layout updates file - load always last
        $updateFiles[] = 'local.xml';
        $layoutStr = '';
        foreach ($updateFiles as $file) {
            $filename = $design->getLayoutFilename($file, array(
                '_area'    => $area,
                '_package' => $package,
                '_theme'   => $theme
            ));
            if (!is_readable($filename)) {
                continue;
            }
            $fileStr = file_get_contents($filename);
            $fileStr = str_replace($this->_subst['from'], $this->_subst['to'], $fileStr);
            $fileXml = simplexml_load_string($fileStr, $elementClass);
            if (!$fileXml instanceof SimpleXMLElement) {
                continue;
            }
            $layoutStr .= $fileXml->innerXml();
        }
        $layoutXml = simplexml_load_string('<layouts>'.$layoutStr.'</layouts>', $elementClass);
        return $layoutXml;
    }
}

and this is Autoload.php line 161

/**
 * Save information about used classes per scope with class popularity
 * Class_Name:popularity
 *
 * @return Varien_Autoload
 */
protected function _saveCollectedStat()
{
    if (!is_dir($this->_collectPath)) {
        @mkdir($this->_collectPath);
        @chmod($this->_collectPath, 0777);
    }

    if (!is_writeable($this->_collectPath)) {
        return $this;
    }

    foreach ($this->_arrLoadedClasses as $scope => $classes) {
        $file = $this->_collectPath.DIRECTORY_SEPARATOR.$scope.'.csv';
        $data = array();
        if (file_exists($file)) {
            $data = explode("\n", file_get_contents($file));
            foreach ($data as $index => $class) {
                $class = explode(':', $class);
                $searchIndex = array_search($class[0], $classes);
                if ($searchIndex !== false) {
                    $class[1]+=1;
                    unset($classes[$searchIndex]);
                }
                $data[$index] = $class[0].':'.$class[1];
            }
        }
        foreach ($classes as $class) {
            $data[] = $class . ':1';
        }
        file_put_contents($file, implode("\n", $data));
    }
    return $this;
}

}

Answer 1

You deleted VES_PdfPro, so the files are no longer found. You need to clear your cache, so the config is reread to make sure the observer are no longer used.

And to find the broken XML file you can use xmllint