This may be helpful if you logged in and received the following message.
Cannot find instance ‘ICS_UserProfile::ICS-PROFILE-default-profile’
Quick and Dirty:
This means that somewhere along the way a user profile has been removed that is associated with the account that is being used to login with. This can also mean that the repository has been corrupted. To fix this, go to <SAM Home>/local/repos/icf and restore the last .rps file.