Upgrade to XOOPS 2.2.x From 2.0.x

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Enable PHP debug

Go to your administration area => system module => preferences => general settings and enable PHP debug

Run pre-upgrade script

After uploading all files in the patch archive, access www.example.com/xoopsupdate.php, replacing www.example.com with your site's URL. This will show error messages and no real content, but don't worry, just proceed to next step

Reload the page

Press the submit button to update the system

Upgrade From 2.2.x

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Enable PHP debug

Go to your administration area => system module => preferences => general settings and enable PHP debug

Upload XOOPS 2.2.x files

Upload the 2.2.x files, overwriting existing files

Update the System Module through the administration area

Congratulations!

Your update should now be complete. If all went well, then your updated site should be up and running. If not, please refer to the FAQ or XOOPS Forums for further assistance.