"A valid provisioning profile matching the application's Identifier '' could not be found" error

I am working on an app that I would like to put onto some iPads (not the App Store). I bought the developer license, and added the provisions on Xcode. Now when I try to build the app for the iPad which I have connected to my computer, I get the error:

A valid provisioning profile matching the application's Identifier '' could not be found

I think that this problem has been caused because I have two different teams running on my Xcode, and I don't know how to specify the correct one (one has expired). Also, I remember when I first created my App that I didn't really pay attention to the fields like 'Company Name', can I change those now?

EDIT: Here are the provisions I do have:

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Solution

This is a very common (to me at least) error. It sounds like you just don't have a mobile provision for the app you're trying to put on your iPad. You need a .mobileprovision file for each app identifier. As for the various names of things, you can edit them in the info tab of your project or in info.plist.

If one of your profiles has expired then delete it, although this shouldn't affect anything.

To get a provision for your app, go to the apple provisioning portal and add a provisioning profile. Then you just have to put all of the specifications (UDID, development cert, application ID) in and it'll kick out a provision. There's a how-to guide on the apple developer site for both making provisions and putting them where they're supposed to be.

For some reason it also looks like your app's identifier is empty; you can change this in your project's info tab. The .mobileprovision app ID and your app's ID have to match EXACTLY otherwise nothing works.