A program operator must be authorized to use the SENDCMD and RCVCMD macroinstructions during VTAM® definition. The APPL definition statement for the application program specifies one of the following:

• AUTH=PPO: Authorizes the application program to send VTAM operator commands to VTAM and to receive both solicited and unsolicited VTAM messages.
• AUTH=SPO: Authorizes the application program to send VTAM operator commands to VTAM and to receive only those VTAM messages that are in reply to those commands.
• AUTH=NOPO: Prohibits the application program from issuing the SENDCMD and RCVCMD macroinstructions. NOPO is the default value for AUTH.