Quote Originally Posted by Sezuel View Post
not sure where you are getting your 'information' but this error has nothing to do with the integrity check this is an error DURING download where the patcher fails to acquire all necessary information prior to trying to install the new data.
You do know that it downloads several files during patching, right? What's displayed is total size of all the patches. That's why you may see it happen "in the middle" of the download.
Downloading one file at a time, checking integrity of the patch and patching, then move on to next file, and so on.