VALIDATE QUEUE [address] [/SELF_RELATIVE]

    Validates the integrity of the specified queue by checking the pointers in
    the queue.  The address is the address of an element of the queue. If the
    address is not specified, then the last element address that was specified
    is used. If a dot is specified as the address, then the last evaluated
    expression is used as the address of an element of the queue.

Additional information available:

/SELF_RELATIVE

    Specifies that the selected queue is a self-relative queue.