Fatal error: Call to undefined method wpdb::set_prefix()

I agree…how do i fix this…….

I just upgraded. I got the same error, same “wp-settings.php on line 209”

any results yet?

You failed to upload ALL of the WordPress files. Particularly those in wp-includes.

Re-upload WordPress, and make sure that every file gets uploaded correctly. You can’t miss any of them.

I actually answered my own question with some google searching.

The error stemmed from my wp-db.php file. I like some others are running on a IIS server and have that pesky problem.

I used this link here and I was able to finish the upgrade.

Hope this helps..it helped me.

If you get the “Call to undefined method wpdb::set_prefix()” than that workaround won’t help you. That workaround does something totally different.

The “Call to undefined method wpdb::set_prefix()” means that you did not upload the new wp-db.php file in the first place. Sure, uploading the modified file will fix the problem, but so would uploading the non-modified one. Plus, if you failed to update one file, you likely failed to update other files as well.

Really. Re-upload a fresh copy of WordPress. I’m not making this stuff up.