When an MNPS structure fails, each VTAM® connected to the structure is notified and attempts to initiate a structure rebuild to create a new version of the structure. The new version of the structure is replenished from the local data of each VTAM. Any data for applications that were recovery pending will be lost.

During a structure rebuild for an MNPS structure, data for the new version of the structure is always replenished from local data. In the case that an MNPS application program owning VTAM has failed and the state is recovery pending, if a rebuild occurs before the application program data is recovered, the data will be copied to the new version of the structure only if at least one VTAM has connectivity to both the original version of the structure and the new version of the structure. If this is not the case, the data is lost and the sessions cannot be recovered.