4.2.2 P1 Upgrade Error Missing Class

[sanadil]

I'm getting the following error:

Fatal error: Class 'vB_Upgrade_421b1' not found in /forums/install/includes/class_upgrade.php on line 425

I'm currently on 4.1.5 P1

Any ideas on what may be going on? This happens after I put my key in and hit upgrade, almost instantly.

[Zachery]

I'd suggest you start by redownloading the package and reuploading all of the 4.2.2 PL1 files. The new files MUST overwrite the old files on the server.

[sanadil]

Bah, thanks. I just looked and for some reason, that one file showed 0KB size. Seems to be the root of my issues, there are a few others. I'm re-uploading everything again.