# Message 12

## Message

"12. Item entry was not a valid selection"

## Description

This is a general message that indicates that a selection via the front panel or remote command is not valid. For example, sending the remote command

    :MTESt2:DISPlay ON

without a mask loaded results in the following error message:

Mask Display entry was not a valid selection

This message is displayed in the message area and is reported as a programming error message.