# Problems with logging in

At run time the operator uses the Login dialog box to log in to the system. If login is successful, the previous user is logged out and the operator is logged in.

Login is unsuccessful under these circumstances:

## Graphic display change

- If the graphic display changes remotely before the operator has pressed the Enter button in the Login dialog box, the dialog box closes and the user is not logged in. If the string pop-up keyboard is open when the display change occurs, both the keyboard and the dialog box close.

## Unknown user or password

- If the user name or password does not match the settings in the Runtime Security editor, the user is not logged in and a diagnostics message is logged.

## See also

Create Login buttons

Use the Login dialog box

Run-time messages to Diagnostics for the Login button