Xcode the application you have selected does not exist

While trying to submit to iTunes Connect with Xcode 6.4. I am getting this error

Today, a user in SO complained about “I am trying to submit to iTunes Connect with Xcode 6.4. I am getting this error”

Unable to Validate Your Application
The application you have selected does not exist.

I am able to find the provisioning profile through my dev account on the previous step.
I have double-checked all identifiers. I tried Application Loader as well and got basically
the same error. What is weird is that I submitted another app several hours before to the 
same account with no issues. Any help would be greatly appreciated.

I was having the same issue, here’s what I did to send the app to the app store:

On XCode create generate the “Archive”, once you get the “Organizer” window/popup, validate it as you normally do. If validated, then click “Export” and select “Save for iOS app store deployment”. Save it somewhere and take note of this location, you’ll need the IPA file.

Install the “Application Loader” from https://itunesconnect.apple.com/apploader/ApplicationLoader_3.1.dmg, if you don’t have it already.

Follow the easy steps to push the app to the app store. That is “Deliver your app”, select the IPA file and that’s it!

Hope this helps!