I can install my app written for myself through XCode smoothly. However, I can not install an app, a ipa file, given from my friend through Xcode => Window => Organizer => My iPhone => Applications => Add .
There is a error message named "a valid provisioning file for this executable was not found."
Does any know why I can only install an app written for myself, but cannot install an ipa file from third parties?
How can I do to install an ipa file? Do I need to request something else from my friend? He told me he can install that ipa file from his device correctly.