address

    Address of an element in a queue.

    If you specify the period (.)  as the address, SDA uses the last
    evaluated expression as the queue element's address.

    If you do not specify an address, the VALIDATE QUEUE command
    determines the address from the last issued VALIDATE QUEUE
    command in the current SDA session.

    If you do not specify an address, and no queue has previously
    been specified, SDA displays the following error message:

    %SDA-E-NOQUEUE, no queue has been specified for validation