VersionCheck.php on line 241 error in Admin after upgrading to 4.5.8

[tcbirthn]

We are getting a Fatal error: Class 'CRM_Mailing_DAO_Mailing' not found in ...wp-content/plugins/civicrm/civicrm/CRM/Utils/VersionCheck.php on line 241 after our upgrade we completed last week. Everything seemed to be working fine then, but I was just informed nobody can get into admin period.

[Hershel]

Can you check if the file

 wp-content/plugins/civicrm/civicrm/CRM/Mailing/DAO/Mailing.php

exists?

[tcbirthn]

It does exist.

[Hershel]

I am uncertain what the problem is. Did you upload the files manually perhaps? I would suggest you upload an archive and unzip it on the server again, just to be sure the files are all there.

[tcbirthn]

I typically upload through FTP for all of my plugins. I uploaded it via FTP without issue. I just do a replace. I can do it again though.

[Hershel]

You can also rename the civicrm.settings.php file and try to re-install into a new, empty database. If that works, and CiviCRM works properly, then the issue is your real DB. If the new one fails also, then your code has a problem.

[tcbirthn]

I re-upload did it.