When running login from the command line in order to switch QAS users, you receive an error after entering the username and password like one of the following:
"Session setup problem, abort."
"Authentication service cannot retrieve authentication info."
"No utmpx entry. You must exec "login" from the lowest level "shell"."
or even "Login incorrect" when the login and password are correct.
Login is no longer a reliable way to switch users, even local users. This not a QAS issue.
Use the su command to switch users.