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just upgrade my site from to
Total Posts:  37
Joined:  2009-03-22

1 backup
donwload all file from server to my pc,
export mysql datebase
and change app/eta/local/xml so it can run on my localhost PC

2 uninstall some extensions which is not used

delete downloader\\pearlib\\pear.ini (if you don\’t delete or change the path ,it will show Magento Downloader “ERROR: failed to mkdir” )
and then upgrade using the key magento-core/Mage_All_Latest._stable

when downloader finish,it will be some error on the frontenf and backend,
such as There has been an error processing your request
Exception printing is disabled by default for security reasons.
Error log record number: XXXXXXXXXXXXXXX

rename /errors/local.xml.sample into /errors/local.xml
and show the detailed error,

4 it show Magento :: Invalid mode for clean() method,and i deleted app/code/core/Zend/Cache and all file under this directory,now i can login into the admin panel

5 then it shows the wishlist module error,i disable this module in adminpanel
6 reindex all and refresh all caches.
7 change template files
Fatal error: Call to a member function toHtml() on a non-object in… Layout.php on line 529

To fix this, edit app/design/frontend/yourpackage/yourtheme/layout/page.xml


<block type=\"core/profiler\" output=\"toHtml\"/>


<block type=\"core/profiler\" output=\"toHtml\" name=\"core_profiler\"/>

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