Xcode iPhone "digest is missing"

Question

"The digest is missing" in xcode organizer for iPhone 4S.

Anybody knows what this means?

I have used the iPhone for testing/development before without problems, and my other iPhone is working just fine... I formatted the MacBook Pro, and everything else is working fine.

See image:

Answer 1

Disconnect the phone/USB from your Mac and reconnected it, restarted Xcode and it worked.

Answer 2

I've no reason to doubt the accepted answer, but I thought I'd mention that for me the error message just went away after a while.

This may be related to iTunes finishing syncing or Aperture finishing downloading videos from my iPhone, but that's just a guess.