I have a \"PLUS\" version of my app and the regular version. I archive both of them using different targets. I upload the ipa\'s to TestFlight (also to my Hockey server) and t
I was battling with this same issue and this question is 2nd on google. The error basically means that there is a reason that the app cannot be installed. There are lots of different reasons this could be the case. The only way to find out is to look at the console while the app installs and a more useful error message will appear there.
If you have access to the machine you can use the organiser window in Xcode to see the console for an attached device. If you don't have access to the machine get the user to install the iPhone Configuration Utility. There are both Windows and Mac versions available to download from Apple. They can then see the console and email the output to you.
In my case I was using Testflight to install development builds. I thought there must be some provisioning issue and tried loads of different things. In the end when I saw the console output it was obvious that we were trying to install an iOS 6 app on an iOS 5 device.