21.   You should change the part number of the existing module or reserve a different module name.

22.   You should check the spelling and enter an existing module name.

23.   A listing of all existing module names can be obtained using LISTREL or LIFESPAN Relational Database Interface.

24.   Module Name An existing module name in LIFESPAN, which can be of type Package, Source, or Pmodel.

25.   Another shuttle flight to the station, carrying equipment and supplies to outfit the existing modules, is tentatively scheduled for May.