If you are facing issue while upgrading from SMF 1.x version to 2.x and you are pretty new to this, then probably you are encountering the following error:

Unknown column ‘a.attachment_type’ in ‘field list’

Suppose your forum is at http://mysmfforum.com and you tried to run the upgrade using http://mysmfforum.com, you will encounter the above error. The solution is to access the upgrade script using the url http://mysmfforum.com/upgrade.php

That should solve your problem.

Please post your comments below..


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