When a remote TP issues a BACKOUT verb, the backout is reported to the local TP as a new primary return code value, AP_BACKED_OUT, on the next (current) verb issued. The local TP is provided access to the sense code information contained in the Backout FMH-7 by setting the secondary_rc field as follows:
This new return code will only be supplied on conversations with synclevel AP_SYNCPT, and therefore will not be presented to existing applications.
The verbs on which this new return code can be returned are: