The export function requires that OAM is active, that the library for the export operation is online and operational, and that the cartridge eject installation exit (CBRUXEJC) is not disabled. This environment is necessary for the exported logical volumes to go through completion processing and for the stacked volumes containing the logical volumes to be ejected. Also, only one export operation can be active in a library (VTS) at a time, and an export and import operation are not allowed to execute simultaneously in the same library (VTS).