Auto-upgrade error: Could not copy file...

[scribu]

Using basic FTP, with nightly build, I get this error for the Core upgrade:

Could not copy file: /public_html/wp/wp-content/upgrade/wordpress-latest.tmp/wordpress/wp-trackback.php

The wp-trackback.php file seems to be there already.

[Denis-de-Bernardy]

My customers used to get this very frequently too, until I forced the FTP to refresh the connection every now and then. What happens, basically, is the FTP session silently dies after a certain duration, rather than after a certain duration per action. WP 2.9 introduced a constant that bumps the duration of the FTP session (can't recall what it is, though).

[scribu]

I've tried setting FTP_TIMEOUT to 120, but that didn't help.

[Denis-de-Bernardy]

I suggest you try again. I make it default to 900, personally. And I've seen some servers require 1800. :-P

[Denis-de-Bernardy]

also, it's FS_TIMEOUT

[dd32]

I hate to say this.. But, Can you manually copy class-wp-upgrader.php and file.php from wp-admin/includes/ over the top of your current install and try again?

[scribu]

I did a manual upgrade and it seems to be working now.